/* Custom CSS Properties - Dark Navy Theme */
:root {
    --color-base: #0E2A4F; /* 指定された濃紺 */
    --color-base-dark: #07172C;
    --color-navy: #0E2A4F; 
    --color-teal: #0cc2c2; /* パステルではなくクリアなティールで視認性向上 */
    --color-teal-light: rgba(12, 194, 194, 0.15);
    --color-white: #ffffff;
    --color-text-main: #eef3f8; /* 実直な白寄りのグレー（高い可読性） */
    --color-text-muted: #aabdd1; /* サブテキスト */
    
    --font-heading: 'Noto Serif JP', serif;
    --font-body: 'Noto Sans JP', sans-serif;
    
    --spacing-section: 100px;
    --transition: 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-body);
    color: var(--color-text-main);
    line-height: 1.8;
    background-color: var(--color-base);
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* Typography */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); line-height: 1.4; color: var(--color-white); font-weight: 400; }
.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
    letter-spacing: 1px;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-teal);
}
p { margin-bottom: 1rem; font-weight: 300; }

/* Layout Utilities */
.container { width: 90%; max-width: 1100px; margin: 0 auto; }
section { padding: var(--spacing-section) 0; }
.bg-light { background-color: var(--color-base-dark); } 
.bg-navy { background-color: var(--color-base); }
.text-white { color: var(--color-white); }
.section-desc { text-align: center; max-width: 700px; margin: 0 auto 3rem; font-size: 1.1rem; color: var(--color-text-muted); }

/* Buttons */
.btn-primary {
    display: inline-block;
    background-color: var(--color-teal);
    color: var(--color-base-dark);
    padding: 1rem 2.5rem;
    border-radius: 4px;
    font-weight: 500;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(12, 194, 194, 0.2);
    transition: var(--transition);
}
.btn-primary:hover {
    background-color: #12d6d6;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(12, 194, 194, 0.4);
}

/* Header */
.header {
    position: fixed; top: 0; left: 0; width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: var(--transition);
}
.header-inner { display: flex; justify-content: space-between; align-items: center; padding: 1rem 5%; height: 80px; }
.logo img { height: 50px; filter: none; }
.main-nav ul { display: flex; gap: 2.5rem; align-items: center; }
.main-nav a { font-size: 0.95rem; font-weight: 500; color: var(--color-navy); letter-spacing: 0.5px; }
.main-nav a:hover { color: var(--color-teal); }

/* Hamburger */
.hamburger { display: none; cursor: pointer; flex-direction: column; gap: 5px; }
.hamburger span { width: 25px; height: 2px; background-color: var(--color-navy); transition: var(--transition); }

/* Hero Section */
.hero { height: 100vh; min-height: 600px; display: flex; align-items: center; background: radial-gradient(circle at center, #143763 0%, #0E2A4F 100%); padding-top: 80px; }
.hero-content { width: 90%; max-width: 1100px; margin: 0 auto; text-align: left; }
.hero-title { font-size: 3.5rem; margin-bottom: 1.5rem; letter-spacing: 2px; line-height: 1.4; color: var(--color-white); font-weight: 500; }
.hero-subtitle { font-size: 1.6rem; color: var(--color-teal); margin-bottom: 3rem; font-weight: 400; letter-spacing: 1.5px; }
.hero-profile { margin-bottom: 3rem; border-left: 2px solid var(--color-teal); padding-left: 1.5rem; }
.hero-profile .role { font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 0.2rem; letter-spacing: 1px; }
.hero-profile .name { font-size: 1.8rem; font-weight: 400; font-family: var(--font-heading); color: var(--color-white); letter-spacing: 1px; }

/* Spacer classes for name */
.space-2 { display: inline-block; width: 2em; }
.space-1 { display: inline-block; width: 1em; }

/* Grids */
.target-grid, .value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.credentials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.credentials-grid .credential-item:nth-child(4), .credentials-grid .credential-item:nth-child(5) { grid-column: span 1; }

/* Target & Value Cards (Glass/Dark style) */
.target-card, .value-card, .credential-item { 
    background: rgba(255, 255, 255, 0.04); 
    border: 1px solid rgba(255, 255, 255, 0.08); /* 繊細な境界線 */
    backdrop-filter: blur(5px);
    border-radius: 8px; 
    box-shadow: 0 10px 30px rgba(0,0,0,0.2); 
    transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease; 
}
.target-card { padding: 3rem 2rem; text-align: center; border-top: 2px solid var(--color-teal); }
.target-card:hover, .value-card:hover { transform: translateY(-5px); background: rgba(255, 255, 255, 0.06); border-color: rgba(255, 255, 255, 0.15); }
.target-icon { margin-bottom: 1.5rem; display: flex; justify-content: center; }
.target-icon-svg { color: var(--color-teal); opacity: 0.9; }
.target-card p { font-weight: 400; margin-bottom: 0; line-height: 1.6; color: var(--color-text-main); }

.value-card { padding: 3rem 2rem; }
.value-card h3 { margin-bottom: 1rem; font-size: 1.25rem; color: var(--color-teal); text-align: center; font-weight: 500; }
.value-card p { color: var(--color-text-muted); }

/* Services */
.service-list { max-width: 800px; margin: 0 auto; }
.service-item { display: flex; margin-bottom: 2rem; background: rgba(255, 255, 255, 0.03); border: 1px solid rgba(255, 255, 255, 0.08); border-radius: 4px; padding: 2rem; transition: var(--transition); }
.service-item:hover { background: rgba(255, 255, 255, 0.06); border-color: rgba(12, 194, 194, 0.4); }
.service-number { font-family: var(--font-heading); font-size: 2.5rem; color: var(--color-teal-light); font-weight: 700; line-height: 1; margin-right: 2rem; }
.service-content h3 { font-size: 1.3rem; margin-bottom: 0.5rem; color: var(--color-white); font-weight: 500; }
.service-content p { color: var(--color-text-muted); margin-bottom: 0; }

/* Credentials */
.credential-item { padding: 2.5rem 2rem; border-left: 2px solid var(--color-teal); border-top: none; }
.credential-item h4 { font-size: 1.1rem; margin-bottom: 0.8rem; color: var(--color-white); font-weight: 400; }
.credential-item p { font-size: 0.95rem; color: var(--color-text-muted); margin-bottom: 0; }

/* Profile */
.profile { padding-bottom: 120px; }
.profile-content { background: rgba(255, 255, 255, 0.03); border: 1px solid rgba(255, 255, 255, 0.08); padding: 5rem 4rem; border-radius: 8px; box-shadow: 0 15px 40px rgba(0,0,0,0.3); }
.profile-name { font-size: 2.2rem; margin-bottom: 0.5rem; font-family: var(--font-heading); font-weight: 400; color: var(--color-white); letter-spacing: 1px; }
.profile-role { color: var(--color-teal); font-weight: 400; margin-bottom: 2.5rem; letter-spacing: 1px; }
.profile-desc { color: var(--color-text-main); font-weight: 300; }

/* Contact */
.contact { text-align: center; }
.contact-email-card { background: rgba(0, 0, 0, 0.2); display: inline-flex; flex-direction: column; padding: 3rem 5rem; border-radius: 8px; margin-top: 2rem; border: 1px solid rgba(255, 255, 255, 0.05); }
.email-label { font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 0.5rem; letter-spacing: 2px; }
.email-link { font-size: 2.2rem; font-family: var(--font-heading); font-weight: 400; color: var(--color-white); letter-spacing: 1px; }
.email-link:hover { color: var(--color-teal); }

/* Footer */
.footer { background-color: var(--color-base-dark); padding: 3rem 5%; text-align: center; border-top: 1px solid rgba(255, 255, 255, 0.05); }
.footer-logo img { height: 30px; margin: 0 auto 1.5rem; opacity: 0.5; filter: brightness(0) invert(1); }
.copyright { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 0; }

/* Animations */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease, transform 0.8s ease; }
.fade-in.appear { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 992px) {
    .target-grid, .value-grid, .credentials-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-title { font-size: 2.8rem; }
}

@media (max-width: 768px) {
    .target-grid, .value-grid, .credentials-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .hamburger { display: flex; }
    .main-nav { position: absolute; top: 80px; left: 0; width: 100%; background-color: rgba(255, 255, 255, 0.98); flex-direction: column; padding: 2rem 0; box-shadow: 0 10px 20px rgba(0,0,0,0.1); clip-path: polygon(0 0, 100% 0, 100% 0, 0 0); transition: clip-path 0.4s ease; border-top: 1px solid rgba(0,0,0,0.05); }
    .main-nav.active { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); }
    .main-nav ul { flex-direction: column; gap: 1.5rem; width: 100%; align-items: center; }
    .hero-title { font-size: 2.2rem; line-height: 1.4; }
    .hero-subtitle { font-size: 1.25rem; }
    .section-title { font-size: 1.8rem; margin-bottom: 2rem; }
    section { padding: 60px 0; }
    .profile-content { padding: 2rem 1.5rem; }
    .contact-email-card { padding: 1.5rem; width: 100%; }
    .email-link { font-size: 1.5rem; }
    .service-item { flex-direction: column; padding: 1.5rem; }
    .service-number { margin-bottom: 1rem; font-size: 2rem; }
    .target-card, .value-card, .credential-item { padding: 1.5rem; }
}