@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400..900;1,400..900&display=swap');

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

body {
    font-family: Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #000000;
    background-color: #ffffff;
}

.container {
    margin: 0 auto;
    padding: 0 2vw;
}

.container-wide {
    max-width: 90vw;
}

.container-narrow {
    max-width: 60vw;
}

.header {
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5vw 2vw;
}

.hero-logo {
    width: 20vw;
    height: auto;
    max-width: 300px;
    max-height: 300px;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 4px 8px rgba(45, 90, 45, 0.2));
}

.hero-logo:hover {
    transform: scale(1.05);
}

.nav {
    display: flex;
    gap: 2vw;
}

.nav-link {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    padding: 0.5vw 1vw;
    border-radius: 0.5vw;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #4a7c4a;
    background-color: #f0f8f0;
}

.main {
    min-height: calc(100vh - 8vw);
    padding: 3vw 0;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.hero {
    text-align: center;
    padding: 6vw 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8fcf8 100%);
    color: #000000;
    border-radius: 2vw;
}

.hero h2 {
    font-family: "Playfair Display", serif;
    font-size: 4vw;
    font-weight: 600;
    color: #000000;
}

.hero p {
    font-size: 1.8vw;
    color: #000000;
    font-weight: 300;
    letter-spacing: 0.5px;
    text-align: center;
}

.topics {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1vw;
    margin: 0;
    flex-wrap: nowrap;
    font-size: 1vw;
    white-space: nowrap;
}

.topic-separator {
    color: #000000;
}

.topic-btn {
    background: none;
    color: #000000;
    border: none;
    padding: 0;
    cursor: pointer;
    font-family: Helvetica, Arial, sans-serif;
    font-size: 1vw;
    text-decoration: none;
    font-weight: normal;
}

.topic-btn:hover {
    opacity: 0.7;
}

.topic-btn.active {
    font-weight: bold;
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(30vw, 1fr));
    gap: 2vw;
}

.post-card {
    background: white;
    border-radius: 1vw;
    border: 1px solid #000000;
    overflow: hidden;
    transition: transform 0.3s ease;
    cursor: pointer;
}

.post-card:hover {
}

.post-card-image {
    width: 100%;
    height: 20vw;
    object-fit: cover;
}

.post-card-content {
    padding: 2vw;
}

.post-card h3 {
    font-family: "Playfair Display", serif;
    font-size: 1.8vw;
    margin-bottom: 1vw;
    color: #000000;
    line-height: 1.4;
    text-align: center;
}

.post-card p {
    color: #000000;
    font-size: 1.2vw;
    margin-bottom: 1.5vw;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1vw;
    color: #999;
}

.post-card-actions {
    display: flex;
    gap: 1vw;
    align-items: center;
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2vw;
    color: #e74c3c;
    display: flex;
    align-items: center;
    gap: 0.5vw;
    transition: transform 0.2s ease;
}

.action-btn:hover {
    transform: scale(1.1);
}

.action-btn.liked {
    color: #e74c3c;
}

.back-link {
    color: #4a7c4a;
    text-decoration: none;
    font-size: 1.2vw;
    margin-bottom: 2vw;
    display: inline-block;
}

.back-link:hover {
    text-decoration: underline;
}

.expl-term {
    position: relative;
    cursor: pointer;
    color: #1a4a72;
    text-decoration: underline dotted;
}

.expl-term sup {
    font-size: 0.8em;
    vertical-align: super;
    margin-left: 0.1em;
    color: #1a4a72;
}

.explain-card {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: min(340px, 90vw);
    max-width: calc(100vw - 2rem);
    max-height: calc(100vh - 3rem);
    background: rgba(255,255,255,0.96);
    border: 1px solid #ddd;
    box-shadow: 0 6px 20px rgba(0,0,0,0.22);
    border-radius: 0.9rem;
    padding: 1rem;
    z-index: 1000;
    display: none;
}

.explain-card.visible {
    display: block;
}

.explain-card-close {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    width: 1.5rem;
    height: 1.5rem;
    border: 1px solid #ccc;
    border-radius: 50%;
    background: #fff;
    color: #555;
    font-size: 0.9rem;
    line-height: 1.5rem;
    text-align: center;
    cursor: pointer;
}

.explain-card-image {
    margin-top: 1.2rem;
    width: 100%;
    max-height: 200px;
    object-fit: cover;
    border-radius: 0.7rem;
    margin-bottom: 0.75rem;
}

.explain-card-content {
    font-size: 0.85rem;
    line-height: 1.45;
    color: #222;
    text-align: left;
    word-break: break-word;
}

.post-header {
    position: relative;
    padding-top: 1vw;
}

.translate-btn {
    position: absolute;
    top: 0;
    left: 0;
    width: 3.25vw;
    height: 3.25vw;
    min-width: 36px;
    min-height: 36px;
    padding: 0.35vw;
    border: none;
    background: transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.translate-btn-icon {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.translate-btn:hover {
    transform: scale(1.06);
}



#post-title {
    font-family: "Playfair Display", serif;
    font-size: 3vw;
    color: #000000;
    line-height: 1.3;
    text-align: center;
}

#post-title + hr {
    border: none;
    height: 2px;
    background: linear-gradient(to right, transparent, #000000, transparent);
    margin: 2vw auto 1vw auto;
    width: 60%;
}

.post-meta {
    display: flex;
    gap: 2vw;
    color: #000000;
    font-size: 1.2vw;
    margin-bottom: 2vw;
}

.post-content {
    background: white;
    padding: 3vw;
    border-radius: 1vw;
    margin-bottom: 3vw;
    font-size: 1.3vw;
    line-height: 1.8;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
    font-family: Helvetica, Arial, sans-serif;
    color: #000000;
    margin: 2vw 0 1vw 0;
    font-weight: 600;
    text-align: center;
}

.post-content h1 { font-size: 2.5vw; }
.post-content h2 { font-size: 2.2vw; }
.post-content h3 { font-size: 1.8vw; }
.post-content h4 { font-size: 1.5vw; }

.post-content p {
    margin-bottom: 1.5vw;
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: 0.5vw;
    margin: 1.5vw 0;
}

.post-content blockquote {
    border-left: 0.5vw solid #7bb87b;
    padding-left: 2vw;
    margin: 2vw 0;
    font-style: italic;
    color: #000000;
    background-color: #f8fcf8;
}

.post-content code {
    background: #f1f2f6;
    padding: 0.2vw 0.5vw;
    border-radius: 0.3vw;
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 1.1vw;
}

.post-content pre {
    background: #f0f8f0;
    color: #000000;
    padding: 2vw;
    border-radius: 0.5vw;
    overflow-x: auto;
    margin: 2vw 0;
    border: 1px solid #e8f5e8;
}

.post-content pre code {
    background: none;
    padding: 0;
    color: inherit;
}

.post-content ul,
.post-content ol {
    margin: 1.5vw 0;
    padding-left: 3vw;
}

.post-content li {
    margin-bottom: 0.5vw;
}

.post-actions {
    display: flex;
    gap: 2vw;
    margin-bottom: 3vw;
}

.post-actions .action-btn {
    background: #7bb87b;
    color: white;
    padding: 1vw 2vw;
    border-radius: 0.5vw;
    font-size: 1.2vw;
    border: none;
    cursor: pointer;
    transition: background 0.3s ease;
}

.post-actions .action-btn:hover {
    background: #6aa86a;
}

.post-actions .action-btn.liked {
    background: #e74c3c;
}

.comments-section {
    background: white;
    padding: 3vw;
    border-radius: 1vw;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.comments-section h3 {
    font-family: Helvetica, Arial, sans-serif;
    font-size: 2vw;
    color: #000000;
    margin-bottom: 2vw;
    font-weight: 600;
    text-align: center;
}

.comment-form {
    margin-bottom: 3vw;
}

.comment-form textarea,
.comment-form input {
    width: 100%;
    padding: 1vw;
    border: 1px solid #ddd;
    border-radius: 0.5vw;
    font-size: 1.2vw;
    margin-bottom: 1vw;
    font-family: inherit;
}

.comment-form textarea {
    min-height: 8vw;
    resize: vertical;
}

.comment-form button {
    background: #7bb87b;
    color: white;
    padding: 1vw 2vw;
    border: none;
    border-radius: 0.5vw;
    font-size: 1.2vw;
    cursor: pointer;
    transition: background 0.3s ease;
}

.comment-form button:hover {
    background: #6aa86a;
}

.comment {
    border-bottom: 1px solid #eee;
    padding: 2vw 0;
}

.comment:last-child {
    border-bottom: none;
}

.comment-author {
    font-weight: 600;
    color: #000000;
    font-size: 1.2vw;
    margin-bottom: 0.5vw;
}

.comment-date {
    color: #999;
    font-size: 1vw;
    margin-bottom: 1vw;
}

.comment-text {
    color: #000000;
    font-size: 1.1vw;
    line-height: 1.6;
}

.comment-note {
    background: #f8fcf8;
    border-left: 0.3vw solid #7bb87b;
    padding: 1vw 1.5vw;
    margin-bottom: 2vw;
    font-size: 1.1vw;
    color: #000000;
    border-radius: 0 0.5vw 0.5vw 0;
}

.comment-note a {
    color: #4a7c4a;
    text-decoration: none;
    font-weight: 500;
}

.comment-note a:hover {
    text-decoration: underline;
}

#giscus-comments {
    margin-top: 2vw;
}

.giscus {
    margin-top: 2vw;
}

@media (prefers-color-scheme: dark) {
    .giscus {
        --giscus-theme: dark;
    }
}

#about-page h2 {
    font-family: "Playfair Display", serif;
    font-size: 2.5vw;
    color: #000000;
    margin-bottom: 2vw;
    text-align: center;
}

#about-page p {
    font-size: 1.3vw;
    line-height: 1.8;
    color: #000000;
}

.footer {
    background: #f8fcf8;
    color: #000000;
    text-align: center;
    padding: 2vw 0;
    margin-top: 4vw;
    border-top: 1px solid #e8f5e8;
}

.footer p {
    font-size: 1.1vw;
}

.footer a {
    color: #4a7c4a;
    text-decoration: none;
    font-weight: 500;
}

.footer a:hover {
    text-decoration: underline;
}

.footer-blog-link {
    color: #4a7c4a;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.footer-blog-link:hover {
    color: #000000;
    text-decoration: none;
}

@media (max-width: 768px) {
    .container-wide,
    .container-narrow {
        max-width: 95vw;
        padding: 0 2.5vw;
    }
    
    .header .container {
        flex-direction: column;
        gap: 2vw;
        padding: 2vw;
    }
    
    .hero {
        padding: 8vw 4vw;
        margin-bottom: 5vw;
        border-radius: 3vw;
    }
    
    .hero-logo {
        width: 35vw;
        max-width: 250px;
        margin-bottom: 3vw;
    }
    
    .nav {
        gap: 3vw;
    }
    
    .nav-link {
        font-size: 3.5vw;
        padding: 2vw 3vw;
    }
    
    .hero h2 {
        font-size: 8vw;
        margin-bottom: 2vw;
    }
    
    .hero p {
        font-size: 3.5vw;
        letter-spacing: 0.3px;
        text-align: center;
    }
    
    .topics {
        gap: 1.5vw;
        margin: 0;
        font-size: 2.5vw;
        flex-wrap: nowrap;
        white-space: nowrap;
    }
    
    .topic-btn {
        font-size: 2.5vw;
    }
    
    .topic-separator {
        font-size: 2.5vw;
    }
    
    .posts-grid {
        grid-template-columns: 1fr;
        gap: 3vw;
    }
    
    .post-card-image {
        height: 50vw;
    }
    
    .post-card h3 {
        font-size: 5vw;
        text-align: center;
    }
    
    .post-card p {
        font-size: 4vw;
    }
    
    .post-card-meta {
        font-size: 3.5vw;
    }
    
    #post-title {
        font-size: 7vw;
        text-align: center;
    }

    .post-header {
        padding-top: 2vw;
    }

    .translate-btn {
        width: 10vw;
        height: 10vw;
        padding: 1vw;
    }

    .explain-card {
        left: 4vw;
        right: 4vw;
        bottom: 4vw;
        width: auto;
        max-width: none;
        max-height: calc(100vh - 8vw);
        padding: 4vw;
        border-radius: 1rem;
    }

    .explain-card-close {
        top: 3vw;
        right: 3vw;
        width: 2rem;
        height: 2rem;
        font-size: 1rem;
        line-height: 2rem;
    }

    .explain-card-image {
        margin-top: 2.4rem;
        max-height: 32vh;
        border-radius: 0.9rem;
    }

    .explain-card-content {
        font-size: 3.2vw;
        line-height: 1.45;
    }

    #post-title + hr {
        margin: 4vw auto 2vw auto;
        width: 80%;
    }
    
    .post-meta {
        font-size: 4vw;
    }
    
    .post-content {
        font-size: 4.5vw;
        padding: 4vw;
    }
    
    .post-content h1 { 
        font-size: 6.5vw;
        text-align: center;
    }
    .post-content h2 { 
        font-size: 6vw;
        text-align: center;
    }
    .post-content h3 { 
        font-size: 5.5vw;
        text-align: center;
    }
    .post-content h4 {
        text-align: center;
    }
    
    .comment-form textarea,
    .comment-form input {
        font-size: 4vw;
        padding: 3vw;
    }
    
    .comment-form button {
        font-size: 4vw;
        padding: 3vw 5vw;
    }
    
    .comment-author {
        font-size: 4vw;
    }
    
    .comment-date {
        font-size: 3.5vw;
    }
    
    .comment-text {
        font-size: 4vw;
    }
    
    .comment-note {
        font-size: 3.5vw;
    }
    
    .back-link {
        font-size: 4vw;
    }
    
    .action-btn {
        font-size: 4vw;
    }
    
    
    .post-actions .action-btn {
        font-size: 4vw;
        padding: 2.5vw 4vw;
    }
    
    .comments-section h3 {
        font-size: 6vw;
        text-align: center;
    }
    
    #about-page h2 {
        font-size: 7vw;
        text-align: center;
    }
    
    #about-page p {
        font-size: 4.5vw;
    }
    
    .footer p {
        font-size: 3.5vw;
    }
    
    .loading {
        font-size: 4vw;
    }
}

.loading {
    text-align: center;
    padding: 4vw;
    color: #000000;
    font-size: 1.2vw;
}

.loading::after {
    content: '';
    display: inline-block;
    width: 2vw;
    height: 2vw;
    border: 0.3vw solid #f0f8f0;
    border-top: 0.3vw solid #7bb87b;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 1vw;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

* {
    transition: all 0.3s ease;
}