/* Overview Section */
.overview-section {
    padding: 6rem 0;
    background: var(--white);
}

.overview-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease;
}

.overview-image:hover {
    transform: translateY(-5px);
}

.overview-image img {
    width: 100%;
    height: auto;
    display: block;
}

.overview-content h2 {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--deep-navy);
    margin-bottom: 1.5rem;
}

.overview-content .lead {
    font-size: 1.25rem;
    color: var(--grey-text);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.overview-content p {
    color: var(--grey-text);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.features-list {
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1rem;
    padding: 0.75rem;
    border-radius: 10px;
    transition: background-color 0.3s ease;
}

.feature-item:hover {
    background-color: rgba(59, 175, 218, 0.05);
}

.feature-item i {
    color: var(--accent-blue);
    margin-right: 1rem;
    margin-top: 0.25rem;
    font-size: 1.2rem;
}

.feature-item span {
    color: var(--grey-text);
    font-weight: 500;
}

/* Variants Section */
.variants-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.variants-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.variant-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.variant-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--hover-shadow);
}

.variant-header {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.variant-header img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.variant-card:hover .variant-header img {
    transform: scale(1.05);
}

.variant-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--accent-blue);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(59, 175, 218, 0.3);
}

.variant-body {
    padding: 2rem;
    flex-grow: 1;
}

.variant-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--deep-navy);
    margin-bottom: 1rem;
}

.variant-desc {
    color: var(--grey-text);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.variant-specs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(11, 60, 93, 0.1);
}

.spec-item {
    text-align: center;
}

.spec-item i {
    color: var(--accent-blue);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    display: block;
}

.spec-item span {
    font-size: 0.9rem;
    color: var(--secondary-grey);
    font-weight: 500;
    display: block;
}

.variant-footer {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, rgba(248, 250, 252, 0.9) 0%, rgba(241, 245, 249, 0.9) 100%);
    border-top: 1px solid rgba(11, 60, 93, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-outline-primary {
    border: 2px solid var(--accent-blue);
    color: var(--accent-blue);
    padding: 0.6rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-outline-primary:hover {
    background: var(--accent-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(59, 175, 218, 0.3);
}

.btn-link {
    color: var(--deep-navy);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.btn-link:hover {
    color: var(--accent-blue);
}

/* Specifications Section */
.specs-section {
    padding: 6rem 0;
    background: var(--white);
}

.specs-table-container {
    overflow-x: auto;
    margin: 3rem 0;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

.specs-table thead {
    background: linear-gradient(135deg, var(--accent-blue), var(--deep-navy));
}

.specs-table th {
    color: var(--white);
    padding: 1.5rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.specs-table tbody tr {
    border-bottom: 1px solid rgba(11, 60, 93, 0.1);
    transition: background-color 0.3s ease;
}

.specs-table tbody tr:hover {
    background-color: rgba(59, 175, 218, 0.05);
}

.specs-table td {
    padding: 1.25rem 1.5rem;
    color: var(--grey-text);
    font-weight: 500;
}

.specs-table td:first-child {
    font-weight: 700;
    color: var(--deep-navy);
}

.specs-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    color: var(--secondary-grey);
    font-size: 0.95rem;
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(59, 175, 218, 0.05);
    border-radius: 10px;
    border-left: 4px solid var(--accent-blue);
}

.specs-note i {
    color: var(--accent-blue);
    font-size: 1.2rem;
}

/* Applications Section */
.applications-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.app-card {
    background: var(--white);
    border-radius: 15px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
}

.app-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--accent-blue), var(--glacier-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.app-icon i {
    color: var(--white);
    font-size: 1.8rem;
}

.app-card h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--deep-navy);
    margin-bottom: 1rem;
}

.app-card p {
    color: var(--grey-text);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

/* CTA Section */
.vertical-cta-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--deep-navy));
}

.cta-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2);
}

/* Animation */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stagger animations for cards */
.variant-card:nth-child(1) { animation-delay: 0.1s; }
.variant-card:nth-child(2) { animation-delay: 0.2s; }
.variant-card:nth-child(3) { animation-delay: 0.3s; }
.variant-card:nth-child(4) { animation-delay: 0.4s; }

.app-card:nth-child(1) { animation-delay: 0.1s; }
.app-card:nth-child(2) { animation-delay: 0.2s; }
.app-card:nth-child(3) { animation-delay: 0.3s; }
.app-card:nth-child(4) { animation-delay: 0.4s; }

/* =========================================
   EXTRA MOBILE RESPONSIVE FIXES (ADD AT END)
========================================= */

/* Universal safety */
* {
    max-width: 100%;
    box-sizing: border-box;
}

img {
    max-width: 100%;
    height: auto;
}

/* Fix container overflow */
body {
    overflow-x: hidden;
}

/* ---------- Overview Section Responsive Layout ---------- */
@media (max-width: 992px) {
    .overview-section {
        padding: 4.5rem 0;
    }

    /* Make sure image & content stack */
    .overview-image {
        margin-bottom: 2rem;
    }

    .overview-content h2 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .overview-section {
        padding: 3.5rem 0;
    }

    .overview-content h2 {
        font-size: 2rem;
        line-height: 1.2;
    }

    .overview-content .lead {
        font-size: 1.05rem;
    }

    .overview-content p {
        font-size: 0.98rem;
    }

    .feature-item {
        padding: 0.65rem;
    }

    .feature-item i {
        font-size: 1.1rem;
        margin-right: 0.75rem;
    }
}

@media (max-width: 576px) {
    .overview-section {
        padding: 3rem 0;
    }

    .overview-content h2 {
        font-size: 1.7rem;
    }

    .overview-content .lead {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .overview-content p {
        margin-bottom: 1.5rem;
        font-size: 0.95rem;
    }

    .overview-image {
        border-radius: 16px;
    }
}

/* ---------- Variants Grid Responsive ---------- */
@media (max-width: 992px) {
    .variants-section {
        padding: 4.5rem 0;
    }

    .variants-grid {
        gap: 1.8rem;
    }

    .variant-body {
        padding: 1.6rem;
    }

    .variant-footer {
        padding: 1.2rem 1.6rem;
    }
}

@media (max-width: 768px) {
    .variants-section {
        padding: 3.8rem 0;
    }

    .variants-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        max-width: 520px;
        margin-left: auto;
        margin-right: auto;
    }

    .variant-header {
        height: 210px;
    }

    .variant-title {
        font-size: 1.35rem;
    }

    .variant-desc {
        font-size: 0.95rem;
    }

    /* Specs: 3 columns -> 2 columns */
    .variant-specs {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .variants-grid {
        max-width: 100%;
    }

    .variant-header {
        height: 200px;
    }

    .variant-body {
        padding: 1.4rem;
    }

    /* Specs: 2 columns -> 1 column */
    .variant-specs {
        grid-template-columns: 1fr;
        text-align: left;
    }

    .spec-item {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        gap: 10px;
        text-align: left;
    }

    .spec-item i {
        margin-bottom: 0;
        font-size: 1.1rem;
    }

    .spec-item span {
        font-size: 0.95rem;
    }

    .variant-footer {
        flex-direction: column;
        align-items: stretch;
        gap: 0.9rem;
    }

    .btn-outline-primary,
    .btn-link {
        width: 100%;
        text-align: center;
        padding: 0.85rem 1rem;
    }
}

/* ---------- CTA Section Responsive ---------- */
@media (max-width: 992px) {
    .vertical-cta-section {
        padding: 4.5rem 0;
    }

    .cta-section {
        padding: 2.5rem;
    }
}

@media (max-width: 768px) {
    .vertical-cta-section {
        padding: 3.8rem 0;
    }

    .cta-section {
        padding: 2rem;
        border-radius: 18px;
    }
}

@media (max-width: 480px) {
    .vertical-cta-section {
        padding: 3.2rem 0;
    }

    .cta-section {
        padding: 1.6rem;
        border-radius: 16px;
    }
}

/* ---------- Sticky CTA Buttons Better Mobile ---------- */
@media (max-width: 576px) {
    .sticky-cta {
        bottom: 1rem;
        right: 1rem;
        gap: 0.75rem;
    }

    .sticky-btn {
        width: 46px;
        height: 46px;
        font-size: 1.05rem;
    }
}