body {
    font-family: 'Poppins', sans-serif;
    background-color: #0d1117;
    color: #c9d1d9;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

header {
    background: linear-gradient(135deg, #1a252f 0%, #0d1117 100%);
    padding: 50px 20px;
    text-align: center;
    border-bottom: 2px solid #30363d;
    animation: fadeInDown 1s ease-in-out;
}

header h1 {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #ffffff;
    transition: color 0.3s ease;
}

header h1:hover {
    color: #646496;
}

header p {
    font-size: 1.2rem;
    color: #8b949e;
}

.btn-custom {
    background-color: #21262d;
    color: #c9d1d9;
    border: 1px solid #30363d;
    padding: 10px 20px;
    border-radius: 5px;
    transition: all 0.3s ease;
    margin: 5px;
}

.btn-custom:hover {
    background-color: #30363d;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

section {
    padding: 60px 20px;
    animation: fadeIn 1s ease-in-out;
}

.bg-light-section {
    background-color: #f6f8fa;
    color: #24292e;
}

.bg-dark-section {
    background: linear-gradient(135deg, #1a252f 0%, #0d1117 100%);
}

h2 {
    font-weight: 600;
    margin-bottom: 30px;
    position: relative;
    display: block;
    width: 100%;
    text-align: center;
}

h2::after {
    content: '';
    width: 50px;
    height: 3px;
    background-color: #646496;
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.features-row {
    margin-bottom: 30px;
}

.card {
    background-color: #161b22;
    border: 1px solid #30363d;
    border-radius: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    padding: 20px;
    margin: 15px;
    animation: zoomIn 0.5s ease-in-out;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.card i {
    font-size: 2rem;
    color: #646496;
    margin-bottom: 10px;
}

.card h5 {
    font-weight: 600;
    color: #c9d1d9;
}

.card p {
    color: #e6e6e6;
}

.screenshot-img {
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
    cursor: pointer;
    max-width: 100%;
    height: auto;
}

.screenshot-img:hover {
    transform: scale(1.05);
}

pre code {
    background-color: #1e252d;
    padding: 15px;
    border-radius: 5px;
    display: block;
    overflow-x: auto;
    font-size: 0.9rem;
}

.accordion-button {
    background-color: #21262d;
    color: #c9d1d9;
    transition: background-color 0.3s ease;
}

.accordion-button:not(.collapsed) {
    background-color: #30363d;
    color: #ffffff;
}

.accordion-body {
    background-color: #161b22;
    color: #c9d1d9;
}

.accordion-item {
    width: 100%;
}

.list-group-item {
    background-color: #161b22;
    color: #c9d1d9;
    border: none;
}

#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #646496;
    color: #ffffff;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: background-color 0.3s ease, transform 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    animation: bounceIn 1s ease-in-out;
}

#back-to-top:hover {
    background-color: #7878a0;
    transform: scale(1.1);
}

footer {
    background-color: #21262d;
    padding: 20px;
    text-align: center;
    border-top: 1px solid #30363d;
}

footer a {
    color: #646496;
    transition: color 0.3s ease;
}

footer a:hover {
    color: #a0a0c8;
    text-decoration: underline;
}

a {
    color: #646496;
    text-decoration: none;
}

a:hover {
    color: #a0a0c8;
    text-decoration: underline;
}

.image-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.image-overlay.active {
    display: flex;
}

.image-overlay img {
    max-width: 80%;
    max-height: 80%;
    transition: transform 0.3s ease;
}

.image-overlay .close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: #646496;
    color: #ffffff;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    z-index: 1001;
}

.image-overlay .close-btn:hover {
    background: #7878a0;
}

.app-image {
    width: 200px;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 1rem;
    }

    .app-image {
        width: 150px;
    }

    .card {
        margin: 15px;
        padding: 15px;
    }

    .features-row {
        margin-bottom: 20px;
    }

    .screenshot-img {
        max-width: 90%;
    }

    section {
        padding: 40px 10px;
    }
}

@media (max-width: 576px) {
    header h1 {
        font-size: 1.5rem;
    }

    header p {
        font-size: 0.9rem;
    }

    .app-image {
        width: 120px;
    }

    .btn-custom {
        padding: 8px 15px;
        font-size: 0.9rem;
    }

    .card {
        margin: 10px;
        padding: 10px;
    }

    .features-row {
        margin-bottom: 15px;
    }

    .screenshot-img {
        max-width: 100%;
    }

    section {
        padding: 30px 5px;
    }
}