/* ========================================
   VARIABLES
   ======================================== */
:root {
    /* Colors */
    --color-primary: #2B44A7;
    --color-white: #FFFFFF;
    --color-light-bg: #F8F9FA;
    --color-dark: #2C3E50;
    --color-text: #333333;
    --color-text-light: #999999;
    --color-border: #E0E0E0;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Typography */
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Lato', sans-serif;

    /* Transitions */
    --transition-fast: all 0.2s ease;
    --transition-base: all 0.3s ease;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-secondary);
    background: var(--color-white);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}


/* ========================================
   HEADER
   ======================================== */
.header {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    background: var(--color-white);
    z-index: 100;
}

.header .container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.back-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
}

.back-button:hover {
    opacity: 0.7;
}

.page-title {
    font-family: var(--font-primary);
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.main {
    padding: var(--spacing-xl) 0 120px;
}

/* ========================================
   PRODUCT SUMMARY (TOP)
   ======================================== */
.product-summary-top {
    margin-bottom: var(--spacing-xl);
}

.product-name {
    font-family: var(--font-primary);
    font-size: 20px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.product-specs {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.delivery-mode {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.product-price {
    font-family: var(--font-primary);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
}

/* ========================================
   PRODUCT HERO
   ======================================== */
.product-hero {
    margin-bottom: var(--spacing-xl);
    display: flex;
    flex-direction: row-reverse;
    gap: var(--spacing-xl);
    align-items: center;
}

.product-image-container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    height: 250px;
}

.product-image {
    width: 200px;
    height: 250px;
    object-fit: contain;
}

.product-image-container .product-image {
    /* transform: scaleX(-1); */
}

.product-description {
    flex: 1;
}

.description-title {
    font-family: var(--font-primary);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.description-text {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text);
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-family: var(--font-primary);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

/* ========================================
   MODEL OPTIONS
   ======================================== */
.model-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.model-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
}

.model-option:not(.disabled):hover {
    border-color: var(--color-primary);
}

.model-option.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.model-option input[type="radio"] {
    display: none;
}

.model-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex: 1;
}

.model-name {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-dark);
}

.model-price {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-dark);
}

.checkmark {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-border);
    border-radius: 50%;
    margin-left: var(--spacing-md);
    position: relative;
    transition: var(--transition-base);
}

.model-option input[type="radio"]:checked ~ .checkmark {
    border-color: var(--color-primary);
    background: var(--color-primary);
}

.model-option input[type="radio"]:checked ~ .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-white);
    font-size: 14px;
    font-weight: bold;
}

/* ========================================
   SIZE OPTIONS
   ======================================== */
.size-options {
    display: flex;
    gap: var(--spacing-md);
    justify-content: space-between;
}

.size-option {
    flex: 1;
    cursor: pointer;
}

.size-option input[type="radio"] {
    display: none;
}

.size-label {
    display: block;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: 12px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-dark);
    transition: var(--transition-base);
}

.size-option:hover .size-label {
    border-color: var(--color-primary);
}

.size-option input[type="radio"]:checked ~ .size-label {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-white);
}

/* ========================================
   COLOR CAROUSEL
   ======================================== */
.color-carousel {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.carousel-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: var(--transition-fast);
}

.carousel-btn:hover {
    opacity: 0.7;
}

.carousel-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.color-image-container {
    flex: 1;
    max-width: 300px;
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.color-image {
    width: 100%;
    height: 250px;
    object-fit: contain;
}

.color-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-border);
    cursor: pointer;
    transition: var(--transition-fast);
}

.dot.active {
    background: var(--color-primary);
    width: 12px;
    height: 12px;
}

/* ========================================
   QUANTITY
   ======================================== */
.quantity-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: 12px;
}

.quantity-label {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-dark);
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.qty-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-white);
    color: var(--color-dark);
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.qty-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.qty-input {
    width: 50px;
    text-align: center;
    border: none;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-dark);
}

.qty-input:focus {
    outline: none;
}

/* Hide spinner arrows */
.qty-input::-webkit-outer-spin-button,
.qty-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.qty-input[type=number] {
    -moz-appearance: textfield;
}

/* ========================================
   DELIVERY MODE
   ======================================== */
.delivery-select-container {
    margin-bottom: var(--spacing-md);
}

.delivery-select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: 12px;
    font-size: 16px;
    font-family: var(--font-secondary);
    color: var(--color-dark);
    background: var(--color-white);
    cursor: pointer;
    transition: var(--transition-base);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%232B44A7' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-md) center;
    padding-right: 40px;
}

.delivery-select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.delivery-info {
    padding: var(--spacing-md);
    background: var(--color-light-bg);
    border-radius: 12px;
}

.delivery-info p {
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.delivery-info p:last-child {
    margin-bottom: 0;
}

.delivery-info strong {
    font-weight: 600;
}

/* ========================================
   ORDER SUMMARY (BOTTOM)
   ======================================== */
.order-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--color-light-bg);
    border-radius: 12px;
    margin-bottom: var(--spacing-lg);
}

.summary-details {
    flex: 1;
}

.summary-name {
    font-family: var(--font-primary);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xs);
}

.summary-specs {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.summary-delivery {
    font-size: 14px;
    color: var(--color-text-light);
}

.summary-price {
    font-family: var(--font-primary);
    font-size: 20px;
    font-weight: 700;
    color: var(--color-dark);
}

/* ========================================
   VALIDATE BUTTON
   ======================================== */
.validate-btn {
    width: 100%;
    padding: var(--spacing-lg);
    background: linear-gradient(90deg, #2B44A7 0%, #0467cf 84%);
    color: var(--color-white);
    border: none;
    border-radius: 50px;
    font-family: var(--font-primary);
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.validate-btn:hover {
    background: #1f3280;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(43, 68, 167, 0.3);
}

.validate-btn:active {
    transform: translateY(0);
}

/* ========================================
   RESPONSIVE
   ======================================== */

/* Tablet - 768px */
@media screen and (max-width: 768px) {
    .container {
        max-width: 100%;
    }

    .product-image-container {
        height: 220px;
    }

    .product-image {
        width: 180px;
        height: 220px;
    }
}

/* Mobile - 576px */
@media screen and (max-width: 576px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .header {
        padding: var(--spacing-md) 0;
    }

    .page-title {
        font-size: 20px;
    }

    .main {
        padding: var(--spacing-lg) 0 100px;
    }

    .product-name {
        font-size: 18px;
    }

    .product-price {
        font-size: 16px;
    }

    .product-hero {
        gap: var(--spacing-md);
    }

    .product-image-container {
        height: 200px;
    }

    .product-image {
        width: 160px;
        height: 200px;
    }

    .color-image-container {
        height: 200px;
    }

    .color-image {
        height: 200px;
    }

    .description-title {
        font-size: 16px;
    }

    .description-text {
        font-size: 14px;
    }

    .section-title {
        font-size: 16px;
    }

    .model-name,
    .model-price {
        font-size: 14px;
    }

    .size-label {
        font-size: 13px;
        padding: var(--spacing-sm) var(--spacing-xs);
    }

    .quantity-label {
        font-size: 14px;
    }

    .delivery-select {
        font-size: 14px;
    }

    .delivery-info p {
        font-size: 12px;
    }

    .summary-name {
        font-size: 16px;
    }

    .summary-specs,
    .summary-delivery {
        font-size: 13px;
    }

    .summary-price {
        font-size: 18px;
    }

    .validate-btn {
        font-size: 16px;
        padding: var(--spacing-md);
    }
}

/* Small Mobile - 375px */
@media screen and (max-width: 375px) {
    .product-image-container {
        height: 180px;
    }

    .product-image {
        width: 140px;
        height: 180px;
    }

    .color-image-container {
        max-width: 200px;
        height: 180px;
    }

    .color-image {
        height: 180px;
    }

    .size-options {
        gap: var(--spacing-sm);
    }
}

@media screen and (min-width: 1024px) {
    .container {
        max-width: 1000px ;
    }
    .product-image {
        height: auto;
    }
    .product-image-container{
        height: auto;
    }
    h3 {
        font-size: 35px !important;
    }
}