body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(180deg, #081b2c 0%, #0f2a45 100%);
    color: #f4f8fb;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    font-size: 14px;
}

.container {
    max-width: 600px;
    margin: 0px auto;
    background: rgba(255, 255, 255, 0.96);
    padding: 16px;
    min-height: 100vh;
}

.back-btn-container {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid rgba(13, 79, 110, 0.12);
    margin-bottom: 24px;
}

.product-page .back-btn-container {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 600px;
    padding-left: 16px;
    padding-right: 16px;
    background: rgba(255, 255, 255, 0.96);
    z-index: 10;
    margin-bottom: 0;
    border-radius: 0;
}

.back-btn {
    background: none;
    border: none;
    color: #0d4f6e;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 10px;
    text-align: left;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
}

header {
    text-align: center;
    margin-top: 20px;
    margin-bottom: 20px;
}

.product-page header {
    margin-top: 70px;
}

.product-page main {
    margin-bottom: 100px;
}

h1 {
    color: #0d4f6e;
    margin: 0;
    font-size: 1.6rem;
    font-weight: 700;
}

header h1 a {
    text-decoration: none;
    color: inherit;
}

p {
    color: #4b637c;
    margin: 10px 0 0 0;
    font-size: 1.1rem;
    font-weight: 400;
}

.product-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
}

.product-card {
    background: #ffffff;
    border: 1px solid rgba(13, 79, 110, 0.14);
    overflow: hidden;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.product-card.coming-soon {
    cursor: default;
    opacity: 0.82;
}

.product-card:hover {
    border-color: #00a8e8;
}

.product-image {
    width: 100%;
    height: 300px;
    position: relative;
    overflow: hidden;
}

.product-carousel {
    width: 100%;
    height: 100%;
    position: relative;
}

.product-carousel-container {
    display: flex;
    height: 100%;
    transition: transform 0.3s ease;
}

.product-carousel-slide {
    min-width: 100%;
    height: 100%;
}

.product-carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.product-carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(13, 79, 110, 0.18);
    width: 42px;
    height: 42px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
    color: #0d4f6e;
    z-index: 2;
}

.product-carousel-btn:hover {
    background: #00a8e8;
    color: #081b2c;
    transform: translateY(-50%);
}

.product-carousel-btn.prev {
    left: 12px;
}

.product-carousel-btn.next {
    right: 12px;
}

.product-carousel-dots {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 2;
}

.product-carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.75);
    cursor: pointer;
    transition: transform 0.3s ease, background 0.3s ease;
}

.product-carousel-dot.active {
    background: #00a8e8;
}

.product-info {
    padding: 20px;
}

.product-title {
    font-size: 1.45rem;
    font-weight: 700;
    color: #0d4f6e;
    margin: 0 0 10px 0;
}

.product-description {
    color: #4b637c;
    font-size: 1rem;
    margin: 0;
}

.carousel {
    position: relative;
    width: calc(100% + 32px);
    margin: 0 -16px 30px -16px;
    height: 340px;
    overflow: hidden;
    border: none;
    border-radius: 0;
    box-shadow: none;
}

.carousel-container {
    display: flex;
    transition: transform 0.3s ease;
}

.carousel-slide {
    min-width: 100%;
    height: 340px;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(0, 184, 255, 0.35);
    width: 42px;
    height: 42px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
    color: #0d4f6e;
}

.carousel-btn:hover {
    background: #00a8e8;
    color: #081b2c;
    transform: translateY(-50%);
}

.carousel-btn.prev {
    left: 10px;
}

.carousel-btn.next {
    right: 10px;
}

.carousel-dots {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dot.active {
    background: #00a8e8;
}

.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #0d4f6e;
    font-size: 1.2rem;
}

.button-group {
    display: flex;
    flex-direction: row;
    gap: 10px;
    flex-wrap: wrap;
}

.option-btn {
    width: auto;
    min-width: auto;
    padding: 12px 20px;
    border: 2px solid rgba(13, 79, 110, 0.12);
    background: #ffffff;
    color: #203145;
    font-size: 0.8rem;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    border-radius: 10px;
    transition: all 0.3s ease;
    text-align: center;
}

.option-btn.active {
    border-color: #00a8e8;
    background: #00a8e8;
    color: white;
}

.option-btn:hover {
    border-color: #00b8ff;
}

.product-page .submit-btn {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 632px;
    padding: 18px 16px;
    background: #00a8e8;
    color: white;
    border: 1px solid rgba(13, 79, 110, 0.2);
    cursor: pointer;
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 0;
    font-family: 'Poppins', sans-serif;
    transition: all 0.3s ease;
    z-index: 10;
}

#message {
    margin-top: 25px;
    text-align: center;
    font-size: 1.1rem;
}

.message-success {
    color: #10b981;
    font-weight: 600;
}

.message-error {
    color: #ef4444;
    font-weight: 600;
}

#installContainer {
    display: none;
    text-align: center;
    padding: 15px;
    background: #00a8e8;
    color: white;
    margin: 20px 0;
    border-radius: 8px;
}

#installBtn {
    background: white;
    color: #00a8e8;
    border: none;
    padding: 8px 15px;
    border-radius: 5px;
    font-weight: bold;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    margin-top: 10px;
}

#installBtn:hover {
    background: #f0f0f0;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 100;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    padding: 30px 16px;
    border-radius: 14px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.modal-content h2 {
    color: #0d4f6e;
    margin: 0 0 20px 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.modal-content .form-group {
    margin-bottom: 15px;
}

.modal-content label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #0d4f6e;
    font-size: 1rem;
}

.modal-content input {
    width: 100%;
    padding: 12px;
    border: 1px solid rgba(13, 79, 110, 0.2);
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    box-sizing: border-box;
}

.modal-content input:focus {
    outline: none;
    border-color: #00a8e8;
    box-shadow: 0 0 0 3px rgba(0, 168, 232, 0.1);
}

.form-hint {
    font-size: 0.85rem;
    color: #7a8a99;
    margin: 6px 0 0 0;
    font-weight: 400;
}

.modal-buttons {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.modal-btn {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    transition: all 0.3s ease;
}

.modal-btn.submit {
    background: #00a8e8;
    color: white;
}

.modal-btn.submit:hover {
    background: #0091c2;
}

.modal-btn.cancel {
    background: #f0f0f0;
    color: #0d4f6e;
}

.modal-btn.cancel:hover {
    background: #e0e0e0;
}