/* Navigation Pills */
 .nav-pills {
 display: flex;
 flex-wrap: wrap;
 gap: .75rem;
 justify-content: center;
 margin: 2rem 0;
 }
 .nav-pill {
 padding: 10px 20px;
 background: var(--light-gray);
 border-radius: 24px;
 font-size: .875rem;
 font-weight: 500;
 color: var(--text-medium);
 text-decoration: none;
 transition: all .2s ease;
 }
 .nav-pill:hover {
 background: var(--primary-light);
 color: var(--primary-blue);
 }
 .nav-pill.active {
 background: var(--primary-blue);
 color: var(--white);
 }

 .chemistry-process {
 display: flex;
 flex-wrap: wrap;
 justify-content: center;
 align-items: center;
 gap: 1rem;
 margin: 3rem 0;
 }
 .chemistry-stage {
 flex: 0 0 280px;
 background: var(--bg-white);
 border-radius: 12px;
 padding: 1rem;
 border: 1px solid var(--border-gray);
 text-align: center;
 }
 .chemistry-stage-icon {
 width: 70px;
 height: 70px;
 background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
 border-radius: 50%;
 display: flex;
 align-items: center;
 justify-content: center;
 margin: 0 auto 1rem;
 color: white;
 font-size: 1.75rem;
 }
 .chemistry-arrow {
 font-size: 2rem;
 color: var(--primary-blue);
 }
 @media (max-width: 768px) {
 .chemistry-arrow {
 transform: rotate(90deg);
 }
 }
 .coagulant-grid {
 display: grid;
 grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
 gap: 1.5rem;
 margin-top: 2rem;
 }
 .coagulant-card {
 background: var(--bg-white);
 border-radius: 12px;
 padding: 1rem;
 border: 1px solid var(--border-gray);
 transition: all 0.3s ease;
 }
 .coagulant-card:hover {
 box-shadow: var(--shadow-md);
 transform: translateY(-4px);
 }
 .coagulant-card h4 {
 color: var(--primary-blue);
 margin-bottom: 0.75rem;
 }
 .design-params {
 background: var(--bg-white);
 border-radius: 12px;
 padding: 1rem;
 border: 1px solid var(--border-gray);
 margin-top: 2rem;
 }
 .param-row {
 display: flex;
 justify-content: space-between;
 padding: 0.75rem 0;
 border-bottom: 1px solid var(--border-gray);
 }
 .param-row:last-child {
 border-bottom: none;
 }
 .param-label {
 font-weight: 500;
 color: var(--text-dark);
 }
 .param-value {
 color: var(--text-light);
 }
 .benefits-highlight {
 background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
 border-radius: 12px;
 padding: 1rem;
 color: white;
 margin: 2rem 0;
 }
 .benefits-highlight h3 {
 color: white;
 margin-bottom: 1rem;
 }
 .benefits-highlight ul {
 list-style: none;
 padding: 0;
 }
 .benefits-highlight li {
 padding: 0.5rem 0;
 padding-left: 1.5rem;
 position: relative;
 }
 .benefits-highlight li::before {
 content: '\f00c';
 font-family: 'Font Awesome 6 Free';
 font-weight: 900;
 position: absolute;
 left: 0;
 }
 .hero-features {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 14px;
 margin-top: 2.5rem;
 }
 .hero-feature-item {
 background: rgba(255,255,255,0.1);
 border-radius: 12px;
 padding: 14px;
 text-align: center;
 transition: all 0.3s ease;
 }
 .hero-feature-item:hover {
 background: rgba(255,255,255,0.15);
 transform: translateY(-4px);
 }
 .hero-feature-item i {
 font-size: 2rem;
 color: var(--accent-gold);
 margin-bottom: 12px;
 }
 .hero-feature-item h4 {
 color: var(--white);
 font-size: 1rem;
 margin-bottom: 4px;
 }
 .hero-feature-item p {
 color: rgba(255,255,255,0.7);
 font-size: 0.875rem;
 margin: 0;
 }
 @media (max-width: 992px) {
 .hero-features { grid-template-columns: repeat(2, 1fr); }
 }
 @media (max-width: 768px) {
 .hero-features { grid-template-columns: 1fr; gap: 16px; }
 .hero-feature-item { padding: 14px; }
 }

.hero-features a.hero-feature-item { transition: all 0.3s ease; }
.hero-features a.hero-feature-item:hover { transform: translateY(-4px); background: rgba(255,255,255,0.15); }
.hero-features a.hero-feature-item:hover h4 { color: #8a6d1c; }