/* ════════════════════════════════════════
   PURIFIER DIAGRAM SECTION
   ════════════════════════════════════════ */

.purifier-diagram-section {
    padding: 5rem 0;
    background: linear-gradient(160deg, #0a1628 0%, #0d2040 40%, #0a2e1a 100%);
    position: relative;
    overflow: hidden;
}

.purifier-diagram-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 200, 180, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.purifier-diagram-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(34, 197, 94, 0.07) 0%, transparent 70%);
    pointer-events: none;
}

.purifier-diagram-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: 3rem;
}

/* ── Image side ── */
.purifier-diagram-img-wrap {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.purifier-diagram-img-wrap::before {
    content: '';
    position: absolute;
    inset: -20px;
    background: radial-gradient(ellipse at center, rgba(0, 200, 180, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.purifier-diagram-img {
    max-width: 100%;
    max-height: 700px;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 20px 60px rgba(0, 200, 180, 0.25));
    transition: transform 0.4s ease, filter 0.4s ease;
}

.purifier-diagram-img:hover {
    transform: scale(1.03);
    filter: drop-shadow(0 30px 80px rgba(0, 200, 180, 0.35));
}

/* ── Steps side ── */
.purifier-diagram-info {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.purifier-step-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(0, 200, 180, 0.15);
    border-radius: 12px;
    padding: 0.9rem 1.1rem;
    transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
    cursor: default;
}

.purifier-step-card:hover {
    background: rgba(0, 200, 180, 0.08);
    border-color: rgba(0, 200, 180, 0.4);
    transform: translateX(6px);
}

.purifier-step-num {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #00c8b4, #22c55e);
    color: #fff;
    font-weight: 800;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 200, 180, 0.4);
    margin-top: 2px;
}

.purifier-step-body h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #e2f8f5;
    margin: 0 0 0.2rem;
    line-height: 1.3;
}

.purifier-step-body p {
    font-size: 0.82rem;
    color: rgba(200, 230, 230, 0.75);
    margin: 0;
    line-height: 1.5;
}

.purifier-cta-wrap {
    margin-top: 0.5rem;
}

/* ── Responsive ── */
@media (max-width: 900px) {
    .purifier-diagram-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .purifier-diagram-img {
        max-height: 500px;
    }
}

@media (max-width: 480px) {
    .purifier-diagram-img {
        max-height: 380px;
    }

    .purifier-step-card {
        padding: 0.75rem 0.9rem;
    }
}