:root {
    --bg-color: #f9f9f9;
    --text-color: #1a1a1a;
    --card-bg: #ffffff;
    --accent-color: #000000;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Pretendard', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

header {
    background-color: var(--accent-color);
    color: #fff;
    padding: 1.5rem 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
}

.header-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

header h1 {
    font-size: 1.2rem;
    letter-spacing: 2px;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 1.5rem;
    font-size: 0.9rem;
    transition: opacity 0.3s ease;
}

nav a:hover {
    opacity: 0.7;
}

main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 7rem 2rem 0;
}

section {
    margin-bottom: 5rem;
    scroll-margin-top: 80px;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--accent-color);
    display: inline-block;
    padding-bottom: 0.5rem;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

#typing-text::after,
#typing-text2::after {
    content: '|';
    animation: blink 0.7s infinite;
    margin-left: 1px;
}

#typing-text2::after {
    visibility: hidden;
}

#typing-text2.typing::after {
    visibility: visible;
}

#typing-text.done::after,
#typing-text2.done::after {
    display: none;
}

.bio-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.bio-card p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.section-desc {
    color: #666;
    margin-bottom: 2rem;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.item-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.item-card:hover {
    transform: translateY(-5px);
}

.item-image {
    overflow: hidden;
    position: relative;
}

.badge-ongoing {
    position: absolute;
    bottom: 0.7rem;
    right: 0.7rem;
    background: #2ecc71;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
}

.badge-ongoing-inline {
    background: #2ecc71;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    vertical-align: middle;
}

.item-image img {
    width: 100%;
    height: 260px;
    object-fit: cover;
    display: block;
}

.item-info {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    gap: 0.3rem;
}

.item-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.date {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 1rem;
}

footer {
    text-align: center;
    padding: 2rem 0;
    color: #888;
    font-size: 0.9rem;
}

.btn-link {
    display: inline-block;
    padding: 0.5rem 0.8rem;
    background-color: var(--accent-color);
    color: #fff;
    text-decoration: none;
    font-size: 0.9rem;
    border-radius: 6px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn-link:hover {
    background-color: #333;
    transform: translateY(-2px);
}

.contact-card {
    background-color: var(--card-bg);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.contact-icon {
    font-size: 1.5rem;
    background-color: var(--bg-color);
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
}

.contact-info strong {
    display: block;
    font-size: 1.1rem;
    color: var(--accent-color);
    margin-bottom: 0.2rem;
}

.contact-info p {
    margin: 0;
    color: #555;
    font-size: 1rem;
}

.contact-link {
    color: #555;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.hidden-item,
.item-card-link.hidden-item {
    display: none;
}

.btn-more-container {
    text-align: center;
    margin-top: 3rem;
}

.btn-more {
    background-color: transparent;
    color: var(--text-color);
    border: 2px solid var(--accent-color);
    padding: 0.8rem 2.5rem;
    font-size: 1rem;
    border-radius: 30px;
    cursor: pointer;
    font-family: 'Pretendard', sans-serif;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-more:hover {
    background-color: var(--accent-color);
    color: #fff;
}

/* Portfolio card link */
.item-card-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}

.item-card-link .item-card {
    cursor: pointer;
    flex: 1;
}

.detail-link {
    margin-top: auto;
    padding-top: 1rem;
    align-self: flex-end;
    font-size: 0.85rem;
    color: #999;
    transition: color 0.2s;
}

.item-card-link:hover .detail-link {
    color: var(--accent-color);
}

/* Portfolio Detail Page */
.detail-page {
    max-width: 700px;
    margin: 0 auto;
}

.detail-back {
    display: inline-block;
    color: #666;
    text-decoration: none;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    transition: color 0.2s;
}

.detail-back:hover {
    color: var(--accent-color);
}

.detail-card {
    overflow: hidden;
}

.detail-hero {
    width: 100%;
    display: block;
    border-radius: 12px;
}

.detail-content {
    padding: 1.5rem 0;
}

.detail-title {
    font-size: 1.6rem;
    border: none;
    display: block;
    padding-bottom: 0;
    margin-bottom: 0.3rem;
}

.detail-desc {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #444;
    white-space: pre-line;
}

.detail-extras {
    margin-top: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.detail-extras p {
    font-size: 1rem;
    color: #444;
}

.detail-actions {
    margin-top: 1.5rem;
}

@media screen and (max-width: 768px) {
    header {
        padding: 0.8rem 0;
    }

    .header-container {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.4rem;
        padding: 0 1rem;
        align-items: center;
    }

    header h1 {
        font-size: 1rem;
        letter-spacing: 1px;
    }

    nav {
        display: flex;
        gap: 0.8rem;
    }

    nav a {
        margin: 0;
        font-size: 0.75rem;
    }

    section {
        scroll-margin-top: 60px;
        margin-bottom: 3rem;
    }

    main {
        margin: 0 auto;
        padding: 4rem 1rem 0;
    }

    h2 {
        font-size: 1.4rem;
    }

    .bio-card {
        padding: 1.8rem 1.5rem;
    }

    .bio-card p {
        font-size: 1.05rem;
        line-height: 1.8;
        margin-bottom: 1.2rem;
    }

    .bio-card p:last-child {
        margin-bottom: 0;
    }

    .item-card, .bio-card, .contact-card {
        box-shadow: 0 2px 12px rgba(0,0,0,0.1);
        border: 1px solid #e8e8e8;
    }

    .gallery {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }

    .item-image img {
        height: 260px;
    }

    .btn-more {
        width: 100%;
        padding: 0.9rem 1rem;
    }

    .contact-card {
        padding: 1.2rem;
        gap: 1rem;
    }

    .contact-item {
        flex-direction: row;
        text-align: left;
        gap: 1rem;
        align-items: center;
    }

    .contact-icon {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
        flex-shrink: 0;
    }

    .contact-info strong {
        font-size: 0.95rem;
    }

    .contact-info p {
        font-size: 0.85rem;
    }

    .detail-content {
        padding: 1.2rem 0;
    }

    .detail-title {
        font-size: 1.3rem;
    }
}