:root {
    --bg-color: #111111;
    --text-color: #ffffff;
    --accent-color: #f1f1f1;
    --border-color: #333;
    --transition-speed: 1.2s;
    --transition-ease: cubic-bezier(0.86, 0, 0.07, 1);
}

body {
    margin: 0; padding: 0; background-color: var(--bg-color); color: var(--text-color);
    font-family: 'Noto Sans KR', 'Inter', sans-serif; overflow: hidden; user-select: none;
}

.view {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0; visibility: hidden; transition: opacity 1s var(--transition-ease), visibility 1s;
    overflow: hidden;
}
.view.active { opacity: 1; visibility: visible; }

/* 1. 랜딩 페이지 */
#landing-view { z-index: 400; }
.landing-panel {
    position: absolute; top: 0; width: 50%; height: 100%;
    background-color: var(--bg-color);
    transition: transform var(--transition-speed) var(--transition-ease);
}
#landing-left-panel { left: 0; }
#landing-right-panel { right: 0; }
#landing-content {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    display: flex; justify-content: center; align-items: center; flex-direction: column;
    z-index: 401; transition: opacity calc(var(--transition-speed) / 2);
}
#landing-canvas-container {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: -1;
}
#landing-view.split .landing-panel { transform: translateX(-100%); }
#landing-view.split #landing-right-panel { transform: translateX(100%); }
#landing-view.split #landing-content { opacity: 0; }

#top-left-title-container {
    position: fixed;
    top: 40px;
    left: 40px;
    z-index: 402;
    font-family: 'Source Code Pro', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    cursor: pointer;
    text-shadow: 1px 1px 10px rgba(0, 0, 0, 0.7);
}
#typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1.5rem;
    background-color: var(--text-color);
    animation: blink 1s step-end infinite;
    margin-left: 5px;
    vertical-align: bottom;
}
@keyframes blink {
    from, to { opacity: 1; }
    50% { opacity: 0; }
}

/* 2. 상세 뷰 (랜딩 전환용) */
#project-detail-view { background-color: transparent; z-index: 300; }
#detail-hero-background {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    z-index: 1; overflow: hidden;
    transition: opacity 0.5s ease-in-out;
}
#detail-hero-background iframe, #detail-hero-background img {
    position: absolute; top: 50%; left: 50%;
    width: 100vw; height: 56.25vw; /* 16:9 */
    min-height: 100vh; min-width: 177.77vh; /* 16:9 */
    transform: translateX(-50%) translateY(-50%);
    pointer-events: none;
}

#detail-scroll-container {
    position: relative; z-index: 2; height: 100%; overflow-y: auto;
}
.title-block-placeholder { height: 101vh; }

#detail-bottom-left-title {
    position: fixed;
    bottom: 40px;
    left: 40px;
    z-index: 1001;
    font-size: 2rem;
    font-weight: 900;
    color: var(--text-color);
    text-shadow: 2px 2px 10px rgba(0,0,0,0.7);
}
#detail-bottom-right-year {
    position: fixed;
    bottom: 40px;
    right: 40px;
    z-index: 1001;
    font-family: 'Source Code Pro', monospace;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
    text-shadow: 2px 2px 10px rgba(0,0,0,0.7);
}

/* 3. 그리드 뷰 */
#grid-view { z-index: 200; display: flex; flex-direction: column; }
#grid-header {
    flex-shrink: 0; border-bottom: 1px solid var(--border-color);
}
.header-top-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 40px;
}
.header-title { font-weight: 700; }
.header-close-btn {
    background: none; border: none; color: var(--text-color);
    font-size: 28px; line-height: 1; cursor: pointer;
}

.header-search-row {
    display: flex; align-items: center; padding: 10px 40px;
    border-top: 1px solid var(--border-color);
}
#search-input {
    flex-grow: 1; background: none; border: none;
    color: var(--text-color); font-size: 1.2rem; padding: 10px 0;
}
#search-input::placeholder { color: var(--accent-color); }
#search-input:focus { outline: none; }
.search-row-right { display: flex; align-items: center; margin-left: 20px; }

#year-select, #manager-select {
    background: none; border: 1px solid var(--border-color); color: var(--text-color);
    border-radius: 5px; padding: 8px; margin-right: 20px;
}
#year-select option, #manager-select option { background-color: var(--bg-color); }
#results-count { color: var(--accent-color); white-space: nowrap; }

.header-tags-row { padding: 20px 40px; border-top: 1px solid var(--border-color); }
#grid-filters .filter-btn {
    background: none; border: 1px solid var(--accent-color); color: var(--accent-color);
    padding: 5px 15px; margin: 0 10px 10px 0; cursor: pointer; font-size: 14px;
    font-weight: 500; border-radius: 15px; transition: all 0.3s;
}
#grid-filters .filter-btn:hover, #grid-filters .filter-btn.info-btn:hover { 
    border-color: var(--text-color); 
    color: var(--text-color); 
}
#grid-filters .filter-btn.active { 
    background-color: var(--text-color); 
    color: var(--bg-color); 
    border-color: var(--text-color); 
}

#grid-split-container { display: flex; flex-grow: 1; overflow: hidden; }
#grid-left-pane, #grid-right-pane { height: 100%; overflow-y: auto; box-sizing: border-box; }

#grid-left-pane {
    flex-basis: 60%; flex-shrink: 0; padding: 40px;
    display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 30px; align-content: flex-start;
}

#grid-divider { 
    flex-basis: 12px; 
    flex-shrink: 0; 
    background-color: transparent; 
    cursor: col-resize; 
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.divider-handle {
    width: 24px;
    height: 48px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    backdrop-filter: blur(2px);
}
.divider-icon {
    width: 20px;
    height: 20px;
    color: rgba(255, 255, 255, 0.7);
    transform: rotate(90deg);
}

.grid-list-item { cursor: pointer; border-radius: 8px; transition: background-color 0.3s; }
.grid-list-item:hover, .grid-list-item.active { background-color: #222; }
.grid-list-item img { width: 100%; aspect-ratio: 16/10; object-fit: cover; border-radius: 8px; }
.grid-list-item-info { padding: 15px; }
.grid-list-item-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 5px; }
.grid-list-item-meta { font-size: 0.9rem; color: var(--accent-color); }

#grid-right-pane-content {
    padding: 40px 60px;
}
#grid-right-pane-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 2.5rem 0 1rem 0;
    color: var(--text-color);
}
#grid-right-pane-content p {
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--accent-color);
    margin: 1rem 0;
}
#grid-right-pane-content img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 2rem 0;
}
#grid-right-pane-content .youtube-embed {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 비율 */
    height: 0;
    overflow: hidden;
    border-radius: 10px;
    margin: 2rem 0;
    background-color: #000;
}
#grid-right-pane-content .youtube-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
#grid-right-pane-content .soundcloud-embed {
    margin: 2rem 0;
    border-radius: 10px;
    overflow: hidden;
}

.top-right-nav {
    position: fixed;
    top: 30px;
    right: 30px;
    z-index: 1000;
    display: flex;
    gap: 10px;
}
.nav-btn {
    position: relative;
    background: transparent; 
    border: 1px solid var(--text-color);
    color: var(--text-color); 
    padding: 10px 20px; 
    cursor: pointer; 
    font-size: 14px;
    font-weight: 700; 
    border-radius: 5px;
    transition: color 0.4s;
    overflow: hidden;
    z-index: 1;
    text-shadow: 1px 1px 10px rgba(0, 0, 0, 0.7);
}
.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--text-color);
    transform: translateX(-100%);
    transition: transform 0.4s var(--transition-ease);
    z-index: -1;
}
.nav-btn:hover {
    color: var(--bg-color);
    text-shadow: none;
}
.nav-btn:hover::before {
    transform: translateX(0);
}

/* 랜딩 페이지에서 메뉴 숨기기 */
#landing-view.active ~ #project-detail-view .top-right-nav,
#landing-view.active ~ #project-detail-view #hamburger-btn {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.top-right-nav, #hamburger-btn {
    transition: opacity 0.5s ease, visibility 0.5s ease;
}


#close-mobile-desc-btn { display: none; }

.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(5px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s;
}
.modal-overlay.visible {
    opacity: 1;
    visibility: visible;
}
.modal-content {
    background-color: #1e1e1e;
    padding: 30px 40px;
    border-radius: 12px;
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    transform: scale(0.8);
    transform-origin: top right;
    opacity: 0;
    transition: transform 0.4s var(--transition-ease), opacity 0.4s var(--transition-ease);
}
.modal-overlay.visible .modal-content {
    transform: scale(1);
    opacity: 1;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
    margin-bottom: 20px;
}
#modal-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
}
.modal-body {
    overflow-y: auto;
    line-height: 1.8;
}
.modal-body a {
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid var(--accent-color);
    transition: border-color 0.3s;
}
.modal-body a:hover {
    border-bottom-color: var(--text-color);
}

#hamburger-btn {
    display: none;
    position: fixed;
    top: 30px;
    right: 30px;
    z-index: 1002;
    width: 30px;
    height: 22px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}
#hamburger-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
    margin: 6px 0;
    transition: transform 0.3s, opacity 0.3s;
    box-shadow: 1px 1px 5px rgba(0, 0, 0, 0.5);
}
#mobile-nav-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.95);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform: translateY(-100%);
    transition: transform 0.5s var(--transition-ease);
}
#mobile-nav-overlay.open {
    transform: translateY(0);
}
#mobile-nav-overlay .mobile-nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 2.5rem;
    font-weight: 700;
    margin: 1.5rem 0;
    display: block;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease 0.3s, transform 0.4s ease 0.3s;
}
#mobile-nav-overlay.open .mobile-nav-links a {
    opacity: 1;
    transform: translateY(0);
}
#mobile-close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 40px;
}

/* 스크롤바 스타일 */
#grid-right-pane::-webkit-scrollbar,
#grid-left-pane::-webkit-scrollbar {
    width: 8px;
}
#grid-right-pane::-webkit-scrollbar-track,
#grid-left-pane::-webkit-scrollbar-track {
    background: transparent; 
}
#grid-right-pane::-webkit-scrollbar-thumb,
#grid-left-pane::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: content-box;
}
#grid-right-pane::-webkit-scrollbar-thumb:hover,
#grid-left-pane::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 255, 255, 0.4);
}


@media (max-width: 800px) {
    .top-right-nav { display: none; }
    #hamburger-btn { display: block; }

    #grid-divider { display: none; }
    #grid-split-container { display: block; }
    #grid-left-pane { 
        width: 100%; height: 100%;
        flex-basis: auto !important; padding: 40px;
    }
    #grid-right-pane {
        position: fixed; bottom: 0; left: 0;
        width: 100%; height: 0; padding: 0;
        background-color: #1a1a1a;
        border-top: 1px solid var(--border-color);
        transition: height 0.4s var(--transition-ease);
        z-index: 250;
    }
    #grid-right-pane.mobile-active { height: 60vh; }
    #grid-right-pane-content {
        padding: 40px;
    }
    #close-mobile-desc-btn {
        display: block; position: absolute;
        top: 15px; right: 20px; font-size: 28px;
        background: none; border: none;
        color: var(--text-color); cursor: pointer; z-index: 10;
    }
    #top-left-title-container, #detail-bottom-left-title {
        left: 20px;
        top: 20px;
        font-size: 1.2rem;
    }
    #detail-bottom-left-title, #detail-bottom-right-year {
        bottom: 20px;
        top: auto;
        font-size: 1.5rem;
    }
    #detail-bottom-right-year {
        right: 20px;
    }
}