/* --- Coverage & Network Styles --- */

/* Page Hero - Global Standard */
.page-hero {
    background: radial-gradient(circle at center, #002699 0%, #000000 100%);
    color: #fff;
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-tag {
    display: inline-block;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(5px);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #e0f2fe;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.page-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.page-subtitle {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.9;
    line-height: 1.6;
    color: #e2e8f0;
}

/* Base Sections */
.block-layout {
    padding: 5rem 0;
}

.block-layout.alt-bg {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: #1e293b;
    margin-bottom: 1rem;
    font-weight: 700;
}

.sub-heading {
    color: #64748b;
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Definition Card */
.highlight-card {
    background: #fff;
    padding: 3rem;
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 50px rgba(0, 38, 153, 0.08);
    /* Blue Tint */
    border: 1px solid #dbeafe;
    border-top: 5px solid #0066FF;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.highlight-card h2 {
    color: #1e293b;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.highlight-card p {
    color: #334155;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* Network Icons */
.network-icons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.network-icon {
    background: #f1f5f9;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    color: #475569;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid #e2e8f0;
}

/* Feature List */
.feature-list {
    list-style: none;
    padding: 0;
    margin-bottom: 2rem;
}

.feature-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #e2e8f0;
    color: #475569;
    line-height: 1.5;
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list strong {
    color: #0066FF;
}

/* Signal Card */
.signal-card {
    background: #fff;
    padding: 3rem;
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 50px rgba(0, 38, 153, 0.1);
    text-align: center;
    border: 1px solid #dbeafe;
    position: relative;
    overflow: hidden;
}

.signal-bars {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 6px;
    height: 60px;
    margin-bottom: 1.5rem;
}

.bar {
    width: 12px;
    background: #cbd5e1;
    border-radius: 2px;
}

.bar-1 {
    height: 20%;
    background: #0066FF;
}

.bar-2 {
    height: 40%;
    background: #0066FF;
}

.bar-3 {
    height: 60%;
    background: #0066FF;
}

.bar-4 {
    height: 80%;
    background: #0066FF;
}

/* Full strength */

.signal-card h3 {
    color: #1e293b;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.signal-card p {
    color: #64748b;
}

/* Limitations Grid */
.limitations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.limit-card {
    background: #fff;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.limit-card h3 {
    color: #1e293b;
    margin-bottom: 1rem;
    font-size: 1.35rem;
}

.limit-card p {
    color: #64748b;
    line-height: 1.6;
}

/* Rows & Layouts */
.row-layout {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.text-column,
.visual-column {
    flex: 1;
}

/* Buttons */
.center-cta {
    text-align: center;
    margin-top: 4rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.btn-primary-small {
    background: var(--color-primary-blue);
    color: #fff;
    padding: 0.85rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.2s;
    box-shadow: 0 4px 6px rgba(0, 102, 255, 0.2);
    display: inline-block;
}

.btn-primary-small:hover {
    background: var(--color-primary-dark);
}

.btn-primary-large {
    background: linear-gradient(135deg, #0066FF 0%, #004080 100%);
    color: #fff;
    padding: 1rem 3rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.2rem;
    display: inline-block;
    box-shadow: 0 8px 20px rgba(0, 102, 255, 0.3);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary-large:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px rgba(0, 102, 255, 0.4);
}

/* Animations */
.fade-in-up,
.slide-in-left,
.slide-in-right {
    opacity: 0;
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    will-change: opacity, transform;
}

.fade-in-up {
    transform: translateY(30px);
}

.slide-in-left {
    transform: translateX(-50px);
}

.slide-in-right {
    transform: translateX(50px);
}

.visible.fade-in-up {
    opacity: 1;
    transform: translateY(0);
}

.visible.slide-in-left {
    opacity: 1;
    transform: translateX(0);
}

.visible.slide-in-right {
    opacity: 1;
    transform: translateX(0);
}

.delay-1 {
    transition-delay: 0.2s;
}

.delay-2 {
    transition-delay: 0.4s;
}

/* Responsive */
@media (max-width: 768px) {
    .page-title {
        font-size: 2.25rem;
    }

    .row-layout {
        flex-direction: column;
        gap: 3rem;
    }

    .slide-in-left,
    .slide-in-right {
        transform: translateY(30px);
    }

    .visible.slide-in-left,
    .visible.slide-in-right {
        transform: translateY(0);
    }
}