/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-bg);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary-color);
}

.logo i {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 5rem 0;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    background-color: var(--white);
    color: var(--primary-color);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image i {
    font-size: 15rem;
    opacity: 0.3;
}

/* Product Section */
.product-section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.product-card {
    background-color: var(--white);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    margin: 0 auto;
}

.product-header {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.badge {
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.badge.verified {
    background-color: #dcfce7;
    color: var(--success-color);
}

.product-details {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--light-bg);
    border-radius: 10px;
}

.detail-item .label {
    font-weight: 500;
    color: var(--text-light);
}

.detail-item .value {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1.1rem;
}

.detail-item .value.price {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.detail-item .value.stock {
    color: var(--success-color);
}

.detail-item .value.status {
    color: var(--success-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Quantity Section */
.quantity-section {
    margin: 2rem 0;
    text-align: center;
}

.quantity-section h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.quantity-control {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.qty-btn {
    width: 50px;
    height: 50px;
    border: none;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background-color 0.3s, transform 0.2s;
}

.qty-btn:hover {
    background-color: var(--primary-dark);
    transform: scale(1.05);
}

.qty-btn:active {
    transform: scale(0.95);
}

#quantityInput {
    width: 100px;
    height: 50px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    outline: none;
    transition: border-color 0.3s;
}

#quantityInput:focus {
    border-color: var(--primary-color);
}

.quantity-info {
    min-height: 30px;
}

.error-message {
    color: var(--danger-color);
    font-weight: 500;
    margin-top: 0.5rem;
}

/* Price Display */
.price-display {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 2rem;
    border-radius: 15px;
    margin: 2rem 0;
}

.total-price {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.total-price .label {
    font-size: 1.25rem;
    font-weight: 500;
}

.total-price .amount {
    font-size: 2rem;
    font-weight: 700;
}

/* Payment Section */
.payment-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.payment-section h3 {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.payment-instruction {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.qr-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin: 2rem 0;
}

.qr-code {
    padding: 1.5rem;
    background-color: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 15px;
    box-shadow: var(--shadow);
}

#qrCanvas {
    display: block;
}

.payment-amount {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* UTR Section */
.utr-section {
    margin: 2rem 0;
}

.utr-section label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: var(--text-dark);
}

#utrInput {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    outline: none;
    transition: border-color 0.3s;
}

#utrInput:focus {
    border-color: var(--primary-color);
}

.submit-btn {
    width: 100%;
    padding: 1rem 2rem;
    margin-top: 1rem;
    background-color: var(--success-color);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.submit-btn:hover {
    background-color: #059669;
    transform: translateY(-2px);
}

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

/* Success Message */
.success-message {
    display: none;
    text-align: center;
    background-color: #dcfce7;
    padding: 2rem;
    border-radius: 15px;
    margin-top: 2rem;
}

.success-message.show {
    display: block;
}

.success-message i {
    font-size: 3rem;
    color: var(--success-color);
    margin-bottom: 1rem;
}

.success-message h3 {
    color: var(--success-color);
    margin-bottom: 1rem;
}

.success-message p {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.utr-display {
    font-size: 1.1rem;
    margin-top: 1rem;
}

/* Check Section */
.check-section {
    padding: 4rem 0;
    background-color: var(--white);
}

.check-card {
    background-color: var(--light-bg);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    margin: 0 auto;
}

.check-card > p {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.check-form {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

#checkUtrInput {
    flex: 1;
    padding: 1rem;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    outline: none;
    transition: border-color 0.3s;
}

#checkUtrInput:focus {
    border-color: var(--primary-color);
}

.check-btn {
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.check-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

/* Status Result */
.status-result {
    display: none;
    margin-top: 2rem;
}

.status-result.show {
    display: block;
}

.status-card {
    background-color: var(--white);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.status-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.status-header i {
    font-size: 2rem;
    color: var(--primary-color);
}

.status-header h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
}

.status-details {
    display: grid;
    gap: 1rem;
}

.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--light-bg);
    border-radius: 10px;
}

.status-item.status-main {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
}

.status-item .label {
    font-weight: 500;
    color: var(--text-light);
}

.status-item .value {
    font-weight: 600;
    color: var(--text-dark);
}

.status-badge {
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.status-badge.pending {
    background-color: #fef3c7;
    color: var(--warning-color);
}

/* Error Result */
.error-result {
    display: none;
    text-align: center;
    background-color: #fee2e2;
    padding: 2rem;
    border-radius: 15px;
    margin-top: 2rem;
}

.error-result.show {
    display: block;
}

.error-result i {
    font-size: 3rem;
    color: var(--danger-color);
    margin-bottom: 1rem;
}

.error-result p {
    color: var(--danger-color);
    font-weight: 500;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer p {
    margin: 0.5rem 0;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

    .hero-image i {
        font-size: 8rem;
    }

    .nav {
        gap: 1rem;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .product-card,
    .check-card {
        padding: 1.5rem;
    }

    .detail-item {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }

    .total-price {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .check-form {
        flex-direction: column;
    }

    .check-btn {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-content h2 {
        font-size: 1.5rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .cta-button {
        padding: 0.75rem 2rem;
        font-size: 1rem;
    }

    .quantity-control {
        gap: 0.5rem;
    }

    .qty-btn {
        width: 40px;
        height: 40px;
    }

    #quantityInput {
        width: 80px;
        height: 40px;
        font-size: 1.2rem;
    }
}