body {
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.7;
    color: #1a1a1a;
    background-color: #f5f5f5;
}

header {
    background-color: #1a1a1a;
    color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 3px solid #9b59b6;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 1200px;
    margin: 0 auto;
}

nav a {
    color: #e0e0e0;
    text-decoration: none;
    padding: 19px 24px;
    display: block;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

nav a:hover,
nav a.active {
    background-color: #2a2a2a;
    border-bottom-color: #9b59b6;
}

main {
    max-width: 1000px;
    margin: 48px auto;
    padding: 48px;
    background-color: white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

h1 {
    color: #1a1a1a;
    font-size: 40px;
    margin-bottom: 24px;
    border-left: 4px solid #9b59b6;
    padding-left: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

h2 {
    color: #2a2a2a;
    font-size: 29px;
    margin-top: 40px;
    margin-bottom: 19px;
    padding-bottom: 8px;
    border-bottom: 2px solid #e0e0e0;
}

h3 {
    color: #3a3a3a;
    font-size: 21px;
    margin-top: 32px;
    margin-bottom: 16px;
}

p {
    margin-bottom: 19px;
    text-align: justify;
    line-height: 1.8;
    color: #2a2a2a;
}

ul, ol {
    margin-left: 32px;
    margin-bottom: 24px;
}

li {
    margin-bottom: 11px;
    color: #2a2a2a;
}

strong {
    color: #1a1a1a;
}

section {
    margin-bottom: 48px;
}

article {
    background-color: #fafafa;
    padding: 32px;
    margin-bottom: 32px;
    border-left: 3px solid #9b59b6;
}

.info-box {
    background-color: #f9f9f9;
    border-left: 4px solid #9b59b6;
    padding: 21px;
    margin: 24px 0;
}

.info-box strong {
    color: #9b59b6;
}

.highlight {
    background-color: #f0f0f0;
    padding: 3px 8px;
    border-bottom: 2px solid #9b59b6;
    font-weight: 500;
}

.character-trait {
    display: inline-block;
    background-color: #2a2a2a;
    color: white;
    padding: 6px 16px;
    font-size: 14px;
    margin: 5px 5px 5px 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.organization-badge {
    display: inline-block;
    background-color: #9b59b6;
    color: white;
    padding: 8px 19px;
    font-size: 16px;
    margin: 8px 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.character-shinji { border-left-color: #9b59b6; }
.character-shinji h3 { color: #9b59b6; }

.character-rei { border-left-color: #6ec1e4; }
.character-rei h3 { color: #6ec1e4; }

.character-asuka { border-left-color: #e74c3c; }
.character-asuka h3 { color: #e74c3c; }

.character-gendo { border-left-color: #2c3e50; }
.character-gendo h3 { color: #2c3e50; }

footer {
    background-color: #1a1a1a;
    color: #e0e0e0;
    text-align: center;
    padding: 32px;
    margin-top: 64px;
    border-top: 3px solid #9b59b6;
}

footer p {
    text-align: center;
    margin-bottom: 0;
    color: #e0e0e0;
}

#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #9b59b6;
    color: white;
    border: none;
    padding: 15px 20px;
    font-size: 19px;
    cursor: pointer;
    border-radius: 5px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    
    text-transform: uppercase;
    letter-spacing: 1px;
}

#backToTop.show {
    opacity: 1;
    visibility: visible;
}

#backToTop:hover {
    background-color: #8e44ad;
    transform: translateY(-3px);
}

#darkModeToggle {
    position: fixed;
    bottom: 30px;
    left: 30px;
    background-color: #2a2a2a;
    color: white;
    border: 2px solid #9b59b6;
    padding: 12px 18px;
    font-size: 16px;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

#darkModeToggle:hover {
    background-color: #9b59b6;
}

body.dark-mode {
    background-color: #1a1a1a;
    color: #e0e0e0;
}

body.dark-mode main,
body.dark-mode article,
body.dark-mode .info-box {
    background-color: #2a2a2a;
    color: #e0e0e0;
}

body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3,
body.dark-mode p,
body.dark-mode li {
    color: #e0e0e0;
}

body.dark-mode h2 {
    border-bottom-color: #4a4a4a;
}

body.dark-mode .highlight {
    background-color: #3a3a3a;
}

body.dark-mode #darkModeToggle {
    background-color: #e0e0e0;
    color: #1a1a1a;
}

body.dark-mode #darkModeToggle:hover {
    background-color: #9b59b6;
    color: white;
}

body.dark-mode .character-shinji h3 { color: #b388ff; }
body.dark-mode .character-rei h3 { color: #80d8ff; }
body.dark-mode .character-asuka h3 { color: #ff6b6b; }
body.dark-mode .character-gendo h3 { color: #95a5a6; }

@media (max-width: 768px) {
    nav a {
        padding: 12px 10px;
        font-size: 11px;
    }
    
    main {
        margin: 24px;
        padding: 32px 24px;
    }
    
    h1 {
        font-size: 32px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    article {
        padding: 24px;
    }
    
    #backToTop,
    #darkModeToggle {
        bottom: 20px;
        padding: 12px 16px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    nav a {
        padding: 10px 8px;
        font-size: 10px;
        letter-spacing: 0.3px;
    }
    
    main {
        margin: 16px;
        padding: 24px 16px;
    }
    
    h1 {
        font-size: 29px;
    }
}