/* ======================
   CASE STUDY BRANDING CSS
   ====================== */

:root {
    --cs-header-height: 80px;
}

.cs-hero {
    background: radial-gradient(circle at top right, rgba(124, 77, 255, 0.2), transparent 50%),
        radial-gradient(circle at bottom left, rgba(0, 242, 254, 0.2), transparent 50%),
        linear-gradient(rgba(2, 4, 8, 0.8), rgba(2, 4, 8, 0.8)),
        repeating-radial-gradient(circle at 0 0, rgba(255, 255, 255, 0.03) 0px, transparent 1px, transparent 40px);
    background-size: 100% 100%, 100% 100%, 100% 100%, 40px 40px;
    padding: 180px 0 100px;
    border-bottom: 2px solid var(--color-primary);
    position: relative;
    overflow: hidden;
}

.cs-hero::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.1) 0%, transparent 70%);
    filter: blur(50px);
}

.cs-category {
    color: var(--color-primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    display: block;
}

.cs-title {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cs-metric-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(0, 242, 254, 0.1);
    color: var(--color-primary);
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: 800;
    font-size: 1.1rem;
    border: 1px solid rgba(0, 242, 254, 0.3);
    box-shadow: var(--shadow-glow);
}

/* Detail Sections */
.cs-detail-section {
    padding: 100px 0;
}

.cs-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: start;
}

.tech-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--border-radius);
    padding: 24px;
    transition: var(--transition);
    backdrop-filter: var(--glass-blur);
    position: relative;
    overflow: hidden;
    height: 100%;
}

.tech-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
    background: rgba(255, 255, 255, 0.05);
}

.tech-icon {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.use-case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.cs-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 2rem;
}

.stack-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.03);
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.cs-flow {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.flow-step {
    background: rgba(255, 255, 255, 0.02);
    padding: 2.5rem;
    border-radius: 15px;
    border-left: 4px solid var(--color-primary);
}

.flow-step h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--color-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.flow-step p {
    font-size: 1.1rem;
    color: var(--color-text);
}

/* Back Button */
.back-btn {
    position: fixed;
    top: 30px;
    left: 30px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 30px;
    color: #fff;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.back-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateX(-5px);
}

@media (max-width: 992px) {
    .cs-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .cs-title {
        font-size: 3rem;
    }
}