/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    line-height: 1.6;
}

/* Container Styles */
.container {
    width: 100%;
    max-width: 500px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    overflow: hidden;
    transition: all 0.3s ease;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    padding: 40px 30px;
    text-align: center;
    color: white;
}

.header h1 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.header p {
    opacity: 0.9;
    font-size: 0.95rem;
}

/* Form Styles */
.form-container {
    padding: 40px 30px;
}

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

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #374151;
    font-size: 0.95rem;
}

.input-field {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #fafafa;
}

.input-field:focus {
    outline: none;
    border-color: #4f46e5;
    background-color: white;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.input-field.error {
    border-color: #ef4444;
    background-color: #fef2f2;
}

.error-message {
    color: #ef4444;
    font-size: 0.85rem;
    margin-top: 6px;
    display: none;
}

/* Button Styles */
.submit-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(79, 70, 229, 0.3);
}

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

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.back-btn {
    padding: 14px 30px;
    background: #6b7280;
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-right: 10px;
}

.back-btn:hover {
    background: #4b5563;
    transform: translateY(-1px);
}

.contact-btn {
    padding: 14px 30px;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.contact-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 5px 15px rgba(245, 158, 11, 0.3);
}

/* Loading Animation */
.loading {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Result Page Styles */
.result-container {
    padding: 40px 30px;
    text-align: center;
}

.result-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 25px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    animation: bounceIn 0.6s ease;
}

.verified {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.expired {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.invalid {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.result-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.verified-title {
    color: #059669;
}

.expired-title {
    color: #dc2626;
}

.invalid-title {
    color: #dc2626;
}

.result-message {
    color: #6b7280;
    margin-bottom: 30px;
    line-height: 1.6;
}

/* Product Info Styles */
.product-info {
    background: #f8fafc;
    border-radius: 12px;
    padding: 20px;
    margin: 25px 0;
    text-align: left;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid #e2e8f0;
}

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

.info-item strong {
    color: #374151;
    font-weight: 600;
}

.status-invalid {
    color: #b45309;              /* Dark amber for invalid */
    font-weight: 600;
    background: #fef3c7;         /* Light amber background */
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.status-verified {
    color: #059669;
    font-weight: 600;
    background: #d1fae5;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.status-expired {
    color: #dc2626;
    font-weight: 600;
    background: #fee2e2;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Social Links */
.social-links {
    background: #1f2937;
    padding: 20px 30px;
    text-align: center;
}

.social-links h3 {
    color: white;
    margin-bottom: 15px;
    font-size: 1rem;
    font-weight: 500;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-icon:hover {
    transform: translateY(-2px);
}

.facebook { background: #1877f2; }
.instagram { background: linear-gradient(45deg, #f09433 0%,#e6683c 25%,#dc2743 50%,#cc2366 75%,#bc1888 100%); }
.twitter { background: #1da1f2; }

/* Animations */
@keyframes bounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

/* Ripple Effect */
@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Mobile-First Responsive Design */

/* Base styles are mobile-first, then enhanced for larger screens */

/* Tablet styles - 768px and up */
@media (min-width: 768px) {
    .container {
        max-width: 600px;
    }

    .header h1 {
        font-size: 2rem;
    }

    .form-container,
    .result-container {
        padding: 50px 40px;
    }

    .input-field {
        padding: 18px 24px;
        font-size: 1.1rem;
    }

    .submit-btn {
        padding: 20px;
        font-size: 1.2rem;
    }

    .result-icon {
        width: 120px;
        height: 120px;
        font-size: 3.5rem;
    }
}

/* Desktop styles - 1024px and up */
@media (min-width: 1024px) {
    body {
        padding: 40px;
    }

    .container {
        max-width: 550px;
    }
}

/* Small mobile devices - 480px and down */
@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .container {
        margin: 0;
        border-radius: 15px;
    }

    .header {
        padding: 25px 20px;
        border-radius: 15px 15px 0 0;
    }

    .header h1 {
        font-size: 1.4rem;
        line-height: 1.3;
    }

    .header p {
        font-size: 0.9rem;
    }

    .form-container,
    .result-container {
        padding: 25px 20px;
    }

    .input-field {
        padding: 14px 16px;
        font-size: 16px; /* Prevents zoom on iOS */
        border-radius: 10px;
    }

    .submit-btn {
        padding: 16px;
        font-size: 1rem;
        border-radius: 10px;
        margin-top: 10px;
    }

    .result-icon {
        width: 90px;
        height: 90px;
        font-size: 2.8rem;
        margin-bottom: 20px;
    }

    .result-title {
        font-size: 1.4rem;
        line-height: 1.3;
        margin-bottom: 12px;
    }

    .result-message {
        font-size: 0.95rem;
        margin-bottom: 25px;
    }

    .product-info {
        padding: 16px;
        margin: 20px 0;
        border-radius: 10px;
    }

    .info-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        padding: 10px 0;
    }

    .info-item span {
        font-size: 0.95rem;
    }

    .action-buttons {
        flex-direction: column;
        gap: 12px;
        width: 100%;
    }

    .back-btn,
    .contact-btn {
        width: 100%;
        padding: 14px 20px;
        margin: 0;
        font-size: 0.95rem;
        border-radius: 10px;
    }

    .social-links {
        padding: 18px 20px;
    }

    .social-links h3 {
        font-size: 0.95rem;
        margin-bottom: 12px;
    }

    .social-icons {
        gap: 16px;
    }

    .social-icon {
        width: 38px;
        height: 38px;
        font-size: 0.9rem;
    }
}

/* Extra small devices - 360px and down */
@media (max-width: 360px) {
    .header {
        padding: 20px 15px;
    }

    .header h1 {
        font-size: 1.3rem;
    }

    .form-container,
    .result-container {
        padding: 20px 15px;
    }

    .input-field {
        padding: 12px 14px;
    }

    .submit-btn {
        padding: 14px;
        font-size: 0.95rem;
    }

    .result-icon {
        width: 80px;
        height: 80px;
        font-size: 2.5rem;
    }

    .result-title {
        font-size: 1.25rem;
    }

    .product-info {
        padding: 14px;
    }

    .social-links {
        padding: 16px 15px;
    }

    .social-icon {
        width: 36px;
        height: 36px;
    }
}

/* Touch-friendly enhancements */
@media (hover: none) and (pointer: coarse) {
    .submit-btn,
    .back-btn,
    .contact-btn {
        min-height: 44px; /* Apple's recommended touch target size */
    }

    .social-icon {
        min-width: 44px;
        min-height: 44px;
    }

    .input-field {
        min-height: 44px;
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .container {
        box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    }

    .submit-btn:hover:not(:disabled) {
        box-shadow: 0 12px 30px rgba(79, 70, 229, 0.4);
    }
}

/* Landscape orientation on mobile */
@media (max-width: 812px) and (orientation: landscape) and (max-height: 500px) {
    body {
        padding: 10px;
    }

    .container {
        max-width: 90vw;
        max-height: 90vh;
        overflow-y: auto;
    }

    .header {
        padding: 15px 20px;
    }

    .header h1 {
        font-size: 1.3rem;
        margin-bottom: 5px;
    }

    .form-container,
    .result-container {
        padding: 20px;
    }

    .result-icon {
        width: 70px;
        height: 70px;
        font-size: 2.2rem;
        margin-bottom: 15px;
    }

    .social-links {
        padding: 12px 20px;
    }
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}