:root {
    --black: #0A0A0A;
    --white: #FDFBF7;
    --gray-01: #1F1F1F;
    --gray-02: #2A2A2A;
    --gray-03: #3A3A3A;
    --gray-04: #FDFBF7;
    --gray-05: #FDFBF7;
    --yellow: #FFD700;
    --yellow-light: #FFE54C;
    --yellow-dark: #C9A227;
    --pink: #C9A227;
    --pink-light: #FFD700;
    --pink-dark: #B89520;
}

.research-hero {
    padding: 120px 0 80px;
    background: linear-gradient(180deg, rgba(255, 215, 0, 0.08) 0%, rgba(201, 162, 39, 0.03) 50%, transparent 100%);
}

.research-main-title {
    font-size: 72px;
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--white) 0%, var(--yellow) 50%, var(--yellow-dark) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
    text-align: center;
}

.research-subtitle {
    font-size: 24px;
    color: var(--gray-03);
    text-align: center;
    font-weight: 400;
    letter-spacing: -0.01em;
}

.research-grid-section {
    padding: 80px 0 120px;
    background: var(--black);
}

.research-articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 32px;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 24px;
}

.research-article-card {
    background: linear-gradient(135deg, rgba(31, 31, 31, 0.6) 0%, rgba(10, 10, 10, 0.8) 100%);
    border: 1px solid rgba(255, 215, 0, 0.08);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 320px;
}

.research-article-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--yellow) 0%, var(--pink) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.research-article-card:hover {
    transform: translateY(-4px);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.04) 0%, rgba(201, 162, 39, 0.04) 100%);
    border-color: rgba(255, 215, 0, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4),
                0 0 60px rgba(255, 215, 0, 0.15);
}

.research-article-card:hover:before {
    transform: scaleX(1);
}

.article-category {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(201, 162, 39, 0.15) 100%);
    color: var(--yellow);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-radius: 24px;
    margin-bottom: 20px;
    align-self: flex-start;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 215, 0, 0.2);
}

.article-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--white);
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    flex-grow: 0;
}

.article-excerpt {
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-04);
    margin-bottom: 24px;
    flex-grow: 1;
    opacity: 0.9;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    margin-bottom: 20px;
}

.article-date,
.article-source {
    font-size: 13px;
    color: var(--gray-03);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.article-source {
    position: relative;
    padding-left: 16px;
}

.article-source:before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--gray-03);
}

.article-read-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--yellow);
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -0.01em;
    transition: all 0.3s ease;
    position: relative;
    padding-bottom: 2px;
}

.article-read-more:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--yellow);
    transition: width 0.3s ease;
}

.article-read-more:hover {
    gap: 12px;
}

.article-read-more:hover:after {
    width: 100%;
}

.research-cta {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--black) 0%, rgba(255, 215, 0, 0.02) 100%);
}

.cta-box {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 80px 40px;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.08) 0%, rgba(255, 215, 0, 0.02) 100%);
    border-radius: 24px;
    border: 1px solid rgba(255, 215, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.cta-box:before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.3;
    }
}

.cta-box h2 {
    font-size: 48px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}

.cta-box p {
    font-size: 20px;
    color: var(--gray-04);
    margin-bottom: 40px;
    position: relative;
    z-index: 1;
}

.research-newsletter {
    display: flex;
    gap: 16px;
    max-width: 500px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.research-newsletter input {
    flex: 1;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: var(--white);
    font-size: 16px;
    transition: all 0.3s ease;
}

.research-newsletter input::placeholder {
    color: var(--gray-03);
}

.research-newsletter input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--yellow);
}

.research-newsletter button {
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--yellow) 0%, var(--yellow-dark) 100%);
    color: var(--black);
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.2);
}

.research-newsletter button:hover {
    background: linear-gradient(135deg, var(--yellow-light) 0%, var(--yellow) 100%);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.3);
}

/* Article number overlay */
.research-article-card {
    counter-increment: article;
}

.research-articles-grid {
    counter-reset: article;
}

.research-article-card::after {
    content: counter(article, decimal-leading-zero);
    position: absolute;
    top: 32px;
    right: 32px;
    font-size: 72px;
    font-weight: 700;
    background: linear-gradient(135deg, rgba(255, 32, 78, 0.08) 0%, rgba(160, 21, 62, 0.08) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", sans-serif;
    line-height: 1;
    pointer-events: none;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.research-article-card:hover::after {
    background: linear-gradient(135deg, rgba(255, 32, 78, 0.15) 0%, rgba(160, 21, 62, 0.15) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transform: scale(1.1);
}

/* Featured tag for certain articles */
.article-featured {
    position: absolute;
    top: 24px;
    right: 24px;
    padding: 6px 12px;
    background: var(--yellow);
    color: var(--black);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-radius: 4px;
    transform: rotate(3deg);
}

/* Responsive design */
@media (max-width: 1200px) {
    .research-articles-grid {
        grid-template-columns: 1fr;
        max-width: 800px;
    }
}

@media (max-width: 768px) {
    .research-main-title {
        font-size: 48px;
    }

    .research-subtitle {
        font-size: 20px;
    }

    .research-articles-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .research-article-card {
        min-height: auto;
        padding: 24px;
    }

    .article-title {
        font-size: 24px;
    }

    .article-excerpt {
        font-size: 15px;
    }

    .cta-box {
        padding: 60px 30px;
    }

    .cta-box h2 {
        font-size: 36px;
    }

    .research-newsletter {
        flex-direction: column;
    }

    .research-article-card::after {
        font-size: 48px;
        top: 24px;
        right: 24px;
    }
}