.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 50px;
    padding: 40px 0;
    position: relative;
}

.header h1 {
    font-family: "Orbitron", sans-serif;
    font-size: 3em;
    font-weight: 900;
    margin-bottom: 15px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header .subtitle {
    font-size: 1.3em;
    color: var(--primary-color);
    font-weight: 500;
    letter-spacing: 1px;
}

.back-link {
    left: 20px;
    top: 20px;
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 2px solid var(--primary-color);
    transition: all 0.3s ease;
}

.back-link:hover {
    color: var(--secondary-color);
    border-bottom-color: var(--secondary-color);
}

/* Feature Navigation */
.feature-nav {
    margin: 30px 0;
    padding: 30px;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.feature-nav h3 {
    font-family: "Orbitron", sans-serif;
    font-size: 1.4em;
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.feature-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.nav-item {
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(0, 102, 204, 0.1),
        transparent
    );
    transition: left 0.5s ease;
}

.nav-item:hover::before {
    left: 100%;
}

.nav-item:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

/* Feature Sections */
.feature-section {
    margin: 40px 0;
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    position: relative;
    scroll-margin-top: 20px;
}

.feature-section h2 {
    font-family: "Orbitron", sans-serif;
    font-size: 2em;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.feature-section h2::before {
    content: "";
    width: 6px;
    height: 30px;
    background: var(--gradient-primary);
    border-radius: 3px;
}

.feature-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: start;
}

.feature-text {
    font-size: 1.1em;
    color: var(--text-secondary);
    line-height: 1.8;
}

.feature-text h3 {
    font-size: 1.3em;
    color: var(--primary-color);
    margin: 20px 0 10px 0;
    font-weight: 600;
}

.feature-text ul {
    margin: 15px 0;
    padding-left: 25px;
}

.feature-text li {
    margin: 8px 0;
    color: var(--text-secondary);
}

.feature-specs {
    background: var(--light-secondary);
    padding: 25px;
    border-radius: 15px;
    border-left: 4px solid var(--primary-color);
}

.feature-specs h4 {
    font-size: 1.2em;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 600;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.spec-item:last-child {
    border-bottom: none;
}

.spec-label {
    font-weight: 500;
    color: var(--text-primary);
}

.spec-value {
    font-weight: 600;
    color: var(--primary-color);
    text-align: right;
}

.feature-image {
    text-align: center;
    margin-top: 20px;
}

.feature-image img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow-medium);
}

.highlight-box {
    background: linear-gradient(
        135deg,
        rgba(0, 102, 204, 0.1),
        rgba(0, 102, 204, 0.05)
    );
    border: 1px solid rgba(0, 102, 204, 0.2);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
}

.highlight-box h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.1em;
}

.tech-badge {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: 500;
    margin: 5px 5px 5px 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2.2em;
    }

    .feature-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-section {
        padding: 25px;
        margin: 30px 0;
    }

    .back-link {
        position: static;
        display: inline-block;
        margin-bottom: 20px;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Animation */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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