/* ===== HOLOGRAPHIC EXPERIMENTS PAGE STYLES ===== */

/* CSS Variables for Holographic Theme */
:root {
    --hologram-primary: #00ffff;
    --hologram-secondary: #ff00ff;
    --hologram-accent: #ffff00;
    --hologram-bg: rgba(0, 0, 0, 0.9);
    --hologram-border: rgba(0, 255, 255, 0.3);
    --hologram-glow: rgba(0, 255, 255, 0.2);
    --hologram-text: #ffffff;
    --hologram-text-secondary: #cccccc;
}

/* ===== HOLOGRAPHIC HEADER ===== */
.holographic-header {
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.95) 0%, 
        rgba(20, 20, 20, 0.9) 50%, 
        rgba(0, 0, 0, 0.95) 100%);
    position: relative;
    overflow: hidden;
    min-height: 40vh;
    display: flex;
    align-items: center;
}

.holographic-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 0, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 0, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

.header-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.holographic-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(45deg, 
        var(--hologram-primary), 
        var(--hologram-secondary), 
        var(--hologram-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(0, 255, 255, 0.5);
    position: relative;
    font-family: 'Courier New', monospace;
    letter-spacing: 2px;
    background-size: 200% 200%;
    transition: transform 0.25s ease, text-shadow 0.25s ease, background-position 0.6s ease;
}

.holographic-title::before {
    content: 'SYSTEM_LOG_';
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
    color: #ff0000;
    font-family: 'Courier New', monospace;
    opacity: 0.8;
    letter-spacing: 3px;
}

/* Subtle hover interaction for the Experiments title */
.holographic-title::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -10px;
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    width: 140px;
    height: 2px;
    background: linear-gradient(90deg, var(--hologram-primary), var(--hologram-secondary));
    box-shadow: 0 0 12px rgba(0, 255, 255, 0.4);
    opacity: 0.7;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.holographic-title:hover {
    transform: translateY(-2px);
    text-shadow: 0 0 40px rgba(0, 255, 255, 0.6);
    background-position: 100% 0;
}

.holographic-title:hover::after {
    transform: translateX(-50%) scaleX(1);
    opacity: 1;
}

.holographic-description {
    font-size: 1.2rem;
    color: var(--hologram-text-secondary);
    font-family: 'Courier New', monospace;
    opacity: 0.9;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.holographic-scanner {
    position: relative;
    height: 60px;
    margin-top: 2rem;
}

.scanner-line {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--hologram-primary), 
        transparent);
    animation: scan 3s ease-in-out infinite;
}

.scanner-line:nth-child(1) {
    top: 0;
    animation-delay: 0s;
}

.scanner-line:nth-child(2) {
    top: 20px;
    animation-delay: 1s;
}

.scanner-line:nth-child(3) {
    top: 40px;
    animation-delay: 2s;
}

@keyframes scan {
    0%, 100% { opacity: 0; transform: translateX(-50%) scaleX(0); }
    50% { opacity: 1; transform: translateX(-50%) scaleX(1); }
}

/* ===== FILTER SECTION ===== */
.filter-section {
    padding: 2rem 0;
    border-bottom: 1px solid var(--hologram-border);
    position: static; /* disable sticky bar */
}

.filter-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.filter-tabs {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-tab {
    background: transparent;
    border: 1px solid var(--hologram-border);
    color: var(--hologram-text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.filter-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(0, 255, 255, 0.2), 
        transparent);
    transition: left 0.5s ease;
}

.filter-tab:hover::before {
    left: 100%;
}

.filter-tab:hover {
    color: var(--hologram-primary);
    border-color: var(--hologram-primary);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.filter-tab.active {
    background: linear-gradient(135deg, 
        rgba(0, 255, 255, 0.2), 
        rgba(255, 0, 255, 0.2));
    color: var(--hologram-primary);
    border-color: var(--hologram-primary);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.4);
}

.filter-search {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid var(--hologram-border);
    color: var(--hologram-text);
    padding: 0.75rem 1rem 0.75rem 3rem;
    border-radius: 25px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    width: 250px;
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--hologram-primary);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
    background: rgba(0, 0, 0, 0.8);
}

.search-input::placeholder {
    color: var(--hologram-text-secondary);
    opacity: 0.7;
}

.search-icon {
    position: absolute;
    left: 1rem;
    color: var(--hologram-text-secondary);
    font-size: 1rem;
    pointer-events: none;
}

/* ===== SF LAB SLIDER ===== */
.sf-experiments { background: linear-gradient(135deg, rgba(0,0,0,0.95) 0%, rgba(20,20,20,0.9) 50%, rgba(0,0,0,0.95) 100%); padding: 3rem 0; min-height: 60vh; }
.exp-slider { max-width: 1200px; margin: 0 auto; padding: 0 1rem; position: relative; }
.exp-viewport { overflow: hidden; position: relative; padding: 12px 56px; }
.exp-track { display: flex; gap: 1.5rem; will-change: transform; transition: transform 380ms cubic-bezier(.22,.61,.36,1), filter 380ms; }
.exp-card { flex: 0 0 calc(50% - 0.75rem); max-width: calc(50% - 0.75rem); background: rgba(10,12,18,0.7); border: 1px solid var(--hologram-border); border-radius: 18px; position: relative; color: var(--hologram-text); clip-path: polygon(0 12px, 12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%); box-shadow: 0 2px 20px rgba(0,255,255,0.08), inset 0 0 0 1px rgba(0,255,255,0.12); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); cursor: pointer; transition: transform 220ms cubic-bezier(.22,.61,.36,1), box-shadow 220ms ease, border-color 220ms ease, filter 220ms ease; }
.exp-card:hover { transform: translateY(-6px); border-color: var(--hologram-primary); box-shadow: 0 10px 30px rgba(0,255,255,0.18), inset 0 0 0 1px rgba(0,255,255,0.18); filter: saturate(1.05); z-index: 2; }
.exp-card:hover .exp-title { text-shadow: 0 0 16px rgba(0,255,255,0.45); }
.exp-card:hover .exp-cta a { box-shadow: 0 4px 16px rgba(0,255,255,0.30); }
.exp-card::before { content: ''; position: absolute; inset: 0; background: repeating-linear-gradient(0deg, rgba(255,255,255,0.03) 0, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 12px), repeating-linear-gradient(90deg, rgba(255,255,255,0.02) 0, rgba(255,255,255,0.02) 1px, transparent 1px, transparent 12px); pointer-events: none; border-radius: 18px; }
.exp-card.is-active::after { content: ''; position: absolute; top: 0; left: -30%; width: 30%; height: 100%; background: linear-gradient(90deg, transparent, rgba(0,255,255,0.12), transparent); transform: skewX(-12deg); animation: glint 720ms ease-out forwards; pointer-events: none; }
@keyframes glint { 0%{ left:-30%; } 100%{ left:120%; } }
.exp-card__inner { display: grid; grid-template-rows: auto auto auto 1fr auto auto; gap: 1rem; padding: 1.5rem 3rem 1.5rem 1.5rem; min-height: 740px; aspect-ratio: 1 / 1.4142; }
.exp-card__meta { display:flex; align-items:center; justify-content:space-between; height: 40px; font-family: 'Courier New', monospace; }
.exp-page { font-size: 14px; color: var(--hologram-text-secondary); opacity: .85; }
.exp-status { font-size: 13px; padding: 5px 12px; border-radius: 999px; }
.exp-status.success { color:#22c55e; border:1px solid #22c55e; }
.exp-status.progress { color:#f59e0b; border:1px dashed #f59e0b; }
.exp-status.failed { color:#f43f5e; border:1px dotted #f43f5e; }
.exp-title { font-size: clamp(1.1rem,1.8vw,1.6rem); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--hologram-primary); font-weight: 800; }
.exp-readtime { font-size: 14px; color: var(--hologram-text-secondary); opacity: .9; margin-top: -2px; }
.exp-media { display:none; }
.exp-body { color: var(--hologram-text-secondary); font-size: clamp(1rem,1.2vw,1.15rem); line-height: 1.7; display:-webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 4; overflow: hidden; min-height: 96px; }
.exp-tags { display:grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap:10px; justify-content:stretch; align-items:stretch; }
.exp-tag { display:flex; align-items:center; justify-content:center; background: rgba(0,255,255,0.08); border:1px solid rgba(0,255,255,0.25); color: var(--hologram-primary); padding: 8px 10px; border-radius: 999px; font-size: 14px; text-align:center; box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04); }
.exp-cta { margin-top:auto; }
.exp-cta a { display:block; width:100%; text-align:center; padding: 12px 14px; border-radius: 10px; background: linear-gradient(135deg, var(--hologram-primary), var(--hologram-secondary)); color:#000; font-weight:700; text-decoration:none; box-shadow:0 2px 10px rgba(0,255,255,0.2); }
.exp-controls { position:absolute; top:50%; left:0; right:0; transform: translateY(-50%); pointer-events: none; z-index: 5; }
.exp-btn { position:absolute; background:transparent; border:1px solid var(--hologram-border); color:var(--hologram-text); width:48px; height:48px; border-radius:999px; cursor:pointer; transition:all .2s; pointer-events: auto; backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.exp-btn.prev { left: 12px; }
.exp-btn.next { right: 12px; }
.exp-btn:hover { border-color: var(--hologram-primary); box-shadow:0 0 12px rgba(0,255,255,0.25); }
.exp-dots { display:flex; gap:10px; justify-content:center; margin-top: 14px; }
.exp-dot { width:10px; height:10px; border-radius:999px; background: rgba(255,255,255,0.35); border:1px solid var(--hologram-border); cursor:pointer; transition:transform .2s, background-color .2s; }
.exp-dot.is-active { background: var(--hologram-primary); transform: scale(1.25); }

/* Always show two-up; no single-card view */

@media (prefers-reduced-motion: reduce){
  .exp-track { transition: none; }
  .exp-card::after { display:none; }
}

/* ===== HOLOGRAPHIC CARDS ===== */
.holographic-card {
    position: relative;
    transition: all 0.4s ease;
    cursor: pointer;
    display: block;
    text-decoration: none;
    color: inherit;
}

.card-hologram {
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.8) 0%, 
        rgba(20, 20, 20, 0.9) 100%);
    border: 1px solid var(--hologram-border);
    border-radius: 15px;
    padding: 2rem;
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
    height: 450px; /* 고정 높이 설정 */
    display: flex;
    flex-direction: column;
}

/* Noise Effect */
.card-hologram::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.02) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.01) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
    opacity: 0.6;
}

.hologram-border {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 2px solid transparent;
    border-radius: 15px;
    background: linear-gradient(45deg, 
        var(--hologram-primary), 
        var(--hologram-secondary), 
        var(--hologram-accent)) border-box;
    -webkit-mask: 
        linear-gradient(#fff 0 0) padding-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask: 
        linear-gradient(#fff 0 0) padding-box, 
        linear-gradient(#fff 0 0);
    mask-composite: exclude;
    opacity: 0.7;
    transition: opacity 0.4s ease;
}

.holographic-card:hover .hologram-border {
    opacity: 1;
}

.hologram-content {
    position: relative;
    z-index: 2;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-shrink: 0; /* 크기 고정 */
}

.category-badge {
    background: linear-gradient(45deg, #ff0000, #ff6600);
    color: #000;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 0 10px rgba(255, 0, 0, 0.3);
    flex-shrink: 0; /* 크기 고정 */
}

.card-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    flex-shrink: 0; /* 크기 고정 */
    gap: 0.25rem;
    font-size: 0.8rem;
    color: var(--hologram-text-secondary);
    font-family: 'Courier New', monospace;
}

.card-date {
    color: var(--hologram-accent);
}

.card-read-time {
    color: var(--hologram-text-secondary);
    opacity: 0.8;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--hologram-primary);
    margin-bottom: 1rem;
    line-height: 1.3;
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
    flex-shrink: 0; /* 크기 고정 */
    display: -webkit-box;
    line-clamp: 2;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-excerpt {
    color: var(--hologram-text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 0.95rem;
    font-family: 'Courier New', monospace;
    flex-grow: 1; /* 남은 공간 채우기 */
    display: -webkit-box;
    line-clamp: 4;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 80px; /* 최소 높이 설정 */
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-shrink: 0; /* 크기 고정 */
}

.card-tag {
    background: rgba(0, 255, 255, 0.1);
    border: 1px solid rgba(0, 255, 255, 0.3);
    color: var(--hologram-primary);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.card-tag:hover {
    background: rgba(0, 255, 255, 0.2);
    border-color: var(--hologram-primary);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.4);
}

.card-actions {
    margin-top: auto;
    flex-shrink: 0; /* 크기 고정 */
}

.holographic-link {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    color: var(--hologram-accent);
    text-decoration: none;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.75rem 0;
    border-top: 1px solid rgba(255, 255, 0, 0.3);
    transition: all 0.3s ease;
    gap: 0.5rem;
}

.link-arrow {
    color: var(--hologram-secondary);
    transition: transform 0.3s ease;
}

.holographic-link:hover {
    color: var(--hologram-accent);
    text-shadow: 0 0 10px rgba(255, 255, 0, 0.5);
}

.holographic-link:hover .link-arrow {
    transform: translateX(5px);
    color: var(--hologram-secondary);
}

/* Subtle noise overlay */
.hologram-effects {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    background-image: 
        radial-gradient(circle at 30% 70%, rgba(255, 255, 255, 0.02) 0%, transparent 40%),
        radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.015) 0%, transparent 40%);
    opacity: 0.4;
    z-index: 1;
}

.holographic-card:hover,
.holographic-card:focus {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 255, 255, 0.2);
    outline: none;
}

.holographic-card:hover .hologram-effects {
    opacity: 0.6;
}

/* Enhanced noise on hover */
.holographic-card:hover .card-hologram::before {
    opacity: 0.8;
}

/* ===== HOLOGRAPHIC LOADER ===== */
.holographic-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem;
}

.loader-ring {
    width: 60px;
    height: 60px;
    border: 3px solid var(--hologram-border);
    border-top: 3px solid var(--hologram-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loader-text {
    color: var(--hologram-text-secondary);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    text-align: center;
}

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

/* ===== HOLOGRAPHIC ERROR & NO RESULTS ===== */
.holographic-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem;
    text-align: center;
}

.error-icon {
    font-size: 3rem;
    animation: pulse 2s ease-in-out infinite;
}

.error-text {
    color: var(--hologram-text-secondary);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
}

.holographic-no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem;
    text-align: center;
}

.no-results-icon {
        font-size: 2.5rem;
    opacity: 0.7;
}

.no-results-text {
    color: var(--hologram-text-secondary);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

/* ===== HOLOGRAPHIC CARD HOVER EFFECTS ===== */
.holographic-card.hover .hologram-border {
    opacity: 1;
    animation: borderGlow 2s ease-in-out infinite;
}

.holographic-card.hover .hologram-effects {
    opacity: 0.6;
}

.holographic-card.visible {
    animation: cardAppear 0.6s ease-out;
}

@keyframes borderGlow {
    0%, 100% { 
        opacity: 0.7; 
        box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
    }
    50% { 
        opacity: 1; 
        box-shadow: 0 0 30px rgba(0, 255, 255, 0.6);
    }
}

@keyframes cardAppear {
    0% { 
        opacity: 0; 
        transform: translateY(20px) scale(0.95);
    }
    100% { 
        opacity: 1; 
        transform: translateY(0) scale(1);
    }
}

/* ===== HOLOGRAPHIC ARTICLE STYLES ===== */
.holographic-article-header {
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.95) 0%, 
        rgba(20, 20, 20, 0.9) 50%, 
        rgba(0, 0, 0, 0.95) 100%);
    padding: 80px 0 40px;
    position: relative;
    overflow: hidden;
}

.holographic-article-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 0, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

.holographic-article-header .container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.article-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--hologram-text-secondary);
    font-family: 'Courier New', monospace;
}

.article-category {
    background: linear-gradient(45deg, #ffff00, #ff8000);
    color: #000;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.article-date,
.article-read-time {
    opacity: 0.8;
}

.article-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(45deg, 
        var(--hologram-primary), 
        var(--hologram-secondary), 
        var(--hologram-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(0, 255, 255, 0.5);
    font-family: 'Courier New', monospace;
    letter-spacing: 1px;
    line-height: 1.2;
}

.article-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.article-tag {
    background: rgba(0, 255, 255, 0.1);
    border: 1px solid rgba(0, 255, 255, 0.3);
    color: var(--hologram-primary);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.article-tag:hover {
    background: rgba(0, 255, 255, 0.2);
    border-color: var(--hologram-primary);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.4);
}

.holographic-article-content {
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.95) 0%, 
        rgba(20, 20, 20, 0.9) 50%, 
        rgba(0, 0, 0, 0.95) 100%);
    padding: 4rem 0;
    min-height: 60vh;
}

.holographic-article {
    max-width: 1200px;
    margin: 0 auto;
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.8) 0%, 
        rgba(20, 20, 20, 0.9) 100%);
    border: 1px solid var(--hologram-border);
    border-radius: 20px;
    padding: 3rem;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.holographic-article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 2px solid transparent;
    border-radius: 20px;
    background: linear-gradient(45deg, 
        var(--hologram-primary), 
        var(--hologram-secondary), 
        var(--hologram-accent)) border-box;
    -webkit-mask: 
        linear-gradient(#fff 0 0) padding-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask: 
        linear-gradient(#fff 0 0) padding-box, 
        linear-gradient(#fff 0 0);
    mask-composite: exclude;
    opacity: 0.3;
    pointer-events: none;
}

.article-section {
    margin-bottom: 3rem;
    position: relative;
    z-index: 2;
}

.article-section h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--hologram-primary);
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
    position: relative;
    padding-left: 1rem;
}

.article-section h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, 
        var(--hologram-primary), 
        var(--hologram-secondary));
    border-radius: 2px;
}

.article-section h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 1.5rem 0 1rem;
    color: var(--hologram-accent);
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 8px rgba(255, 255, 0, 0.3);
}

.article-section p {
    margin-bottom: 1rem;
    color: var(--hologram-text-secondary);
    line-height: 1.8;
    font-size: 1rem;
    font-family: 'Courier New', monospace;
}

/* Experiment Table */
.holographic-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--hologram-border);
}

.holographic-table th,
.holographic-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
}

.holographic-table th {
    background: rgba(0, 255, 255, 0.1);
    color: var(--hologram-primary);
    font-weight: 600;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.holographic-table td {
    color: var(--hologram-text-secondary);
    font-family: 'Courier New', monospace;
}

/* Problem Solutions */
.problem-solutions {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.problem-item {
    background: rgba(255, 0, 0, 0.1);
    border: 1px solid rgba(255, 0, 0, 0.3);
    border-radius: 10px;
    padding: 1.5rem;
    position: relative;
}

.problem-item h3 {
    color: #ff4444;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.problem-item p {
    margin-bottom: 1rem;
    color: var(--hologram-text-secondary);
}

.solution {
    background: rgba(0, 255, 0, 0.1);
    border: 1px solid rgba(0, 255, 0, 0.3);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1rem;
}

.solution strong {
    color: #44ff44;
    font-weight: 600;
}

/* Insights */
.insights {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.insight-item {
    background: rgba(0, 255, 255, 0.05);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 10px;
    padding: 1.5rem;
    position: relative;
}

.insight-item h3 {
    color: var(--hologram-primary);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.insight-item p {
    color: var(--hologram-text-secondary);
    line-height: 1.6;
}

/* Related Projects */
.related-projects {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.related-project-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 255, 255, 0.1);
    border: 1px solid rgba(0, 255, 255, 0.3);
    color: var(--hologram-primary);
    padding: 0.75rem 1rem;
    border-radius: 10px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.related-project-link:hover {
    background: rgba(0, 255, 255, 0.2);
    border-color: var(--hologram-primary);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.4);
    transform: translateY(-2px);
}

.project-icon {
    font-size: 1.2rem;
}

/* Summary Bullets */
.summary-bullets ul {
    list-style: none;
    padding: 0;
}

.summary-bullets li {
    background: rgba(255, 255, 0, 0.1);
    border: 1px solid rgba(255, 255, 0, 0.3);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    color: var(--hologram-accent);
    font-family: 'Courier New', monospace;
    line-height: 1.6;
    position: relative;
    padding-left: 2rem;
}

.summary-bullets li::before {
    content: '▶';
    position: absolute;
    left: 0.5rem;
    top: 1rem;
    color: var(--hologram-accent);
    font-size: 0.8rem;
}

/* Checklist Tips Section */
.checklist-tips ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.checklist-tips li {
    background: linear-gradient(90deg, rgba(0,255,255,0.08) 0%, rgba(255,255,0,0.06) 100%);
    border: 1.5px solid var(--hologram-primary);
    border-radius: 12px;
    padding: 1.5rem 2rem 1.5rem 3.5rem;
    position: relative;
    box-shadow: 0 2px 16px 0 rgba(0,255,255,0.07);
    transition: box-shadow 0.3s, border-color 0.3s;
    font-family: 'Courier New', monospace;
}

.checklist-tips li:hover {
    border-color: var(--hologram-accent);
    box-shadow: 0 4px 32px 0 rgba(255,255,0,0.15);
}

.checklist-tips li::before {
    content: '\2714';
    position: absolute;
    left: 1.2rem;
    top: 1.5rem;
    font-size: 1.5rem;
    color: var(--hologram-primary);
    text-shadow: 0 0 8px rgba(0,255,255,0.5);
    font-weight: bold;
}

.checklist-tips strong {
    color: var(--hologram-accent);
    font-size: 1.08rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    display: block;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 6px rgba(255,255,0,0.15);
}

.checklist-tips span {
    color: var(--hologram-text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    display: block;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .holographic-title {
        font-size: 2.5rem;
    }
    
    .filter-container {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .filter-tabs {
        justify-content: center;
    }
    
    .search-input {
        width: 100%;
    }
    
    .experiments-grid {
        grid-template-columns: 1fr;
    }
    
    .card-hologram {
        padding: 1.5rem;
        height: 400px; /* 모바일에서도 고정 높이 */
    }
}

@media (max-width: 480px) {
    .holographic-header {
        padding: 80px 0 60px;
    }
    
    .holographic-title {
        font-size: 2rem;
    }
    
    .holographic-description {
        font-size: 1rem;
    }
    
    .filter-tabs {
        gap: 0.5rem;
    }
    
    .filter-tab {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .card-hologram {
        padding: 1rem;
        height: 380px; /* 작은 모바일에서도 고정 높이 */
    }
    
    .card-title {
        font-size: 1.2rem;
    }
}