/* Smooth scrolling */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 2rem;
}

/* Reset & base */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #f9f9f9;
    color: #2c3e50;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header, footer {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

main {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 0;
}

header {
    padding: 1rem 0;
    text-align: center;
    border-bottom: 2px solid #34495e;
}

header h1 {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
    color: #2c3e50;
}

header p {
    margin: 0.25rem 0 0;
    font-size: 1rem;
    color: #34495e;
}

/* Main layout */
.main-container {
    flex-grow: 1;
    padding: 2rem 0;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.sections-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 3rem;
}

.qr-section {
    flex: 1;
    min-width: 300px;
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .sections-container {
        flex-direction: column;
    }
    
    .qr-section {
        width: 100%;
    }
}

section {
    background: #fff;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 8px rgba(44, 62, 80, 0.1);
    height: 100%;
    display: flex;
    flex-direction: column;
}

section h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #34495e;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

input[type="text"],
textarea,
input[type="file"],
select {
    width: 100%;
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin-bottom: 1rem;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus,
textarea:focus,
input[type="file"]:focus,
select:focus {
    border-color: #2980b9;
    outline: none;
}

button {
    background-color: #2980b9;
    color: #fff;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:focus,
button:hover {
    background-color: #1c5980;
    outline: none;
}

.qr-container {
    text-align: center;
    margin-top: 1rem;
}

canvas#qr-canvas {
    max-width: 100%;
    height: auto;
    border: 1px solid #ccc;
    border-radius: 8px;
}

.result-textarea {
    width: 100%;
    height: 120px;
    resize: vertical;
    padding: 0.5rem;
    font-size: 1rem;
    border-radius: 4px 0 0 4px;
    border: 1px solid #ccc;
    border-right: none;
    margin-top: 0.5rem;
    font-family: monospace, monospace;
    background-color: #f4f6f8;
}

.text-copy-container {
    position: relative;
    display: flex;
    margin-top: 0.5rem;
}

.text-copy-container .result-textarea {
    margin-top: 0;
    border-radius: 4px 0 0 4px;
}

.copy-btn {
    background-color: #2980b9;
    color: white;
    border: none;
    padding: 0 1rem;
    cursor: pointer;
    border-radius: 0 4px 4px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
}

.copy-btn:hover {
    background-color: #1c5980;
}

.copy-btn.copied {
    background-color: #27ae60;
}

.qr-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 1rem auto;
    text-align: center;
    width: 100%;
    max-width: 500px;
}

.qr-copy-btn {
    margin-top: 10px;
    background-color: #2980b9;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 16px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
}

.qr-copy-btn:hover {
    background-color: #1c5980;
}

.qr-copy-btn.copied {
    background-color: #27ae60;
}

/* Breadcrumb */
.breadcrumb {
    padding: 1rem 0;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
}

.breadcrumb li {
    display: inline;
}

.breadcrumb li:not(:last-child)::after {
    content: "/";
    margin: 0 0.5rem;
    color: #6c757d;
}

.breadcrumb a {
    color: #2980b9;
    text-decoration: none;
    transition: color 0.2s;
}

.breadcrumb a:hover {
    color: #1a5276;
    text-decoration: underline;
}

.breadcrumb [aria-current="page"] {
    color: #6c757d;
    font-weight: 500;
}

/* Tutorial Section */
.tutorial-section {
    margin: 4rem 0;
}

.tutorial-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.tutorial-step {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #2980b9;
    transition: all 0.3s ease;
}

.tutorial-step:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.tutorial-step h3 {
    margin: 0 0 0.75rem 0;
    color: #2c3e50;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tutorial-step i {
    color: #2980b9;
    font-size: 1.2rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .tutorial-steps,
    .use-cases-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .tutorial-step,
    .use-case,
    .benefit {
        margin-bottom: 1rem;
    }
    
    .tutorial-step:last-child,
    .use-case:last-child,
    .benefit:last-child {
        margin-bottom: 0;
    }
    
    .tutorial-section,
    .use-cases,
    .benefits,
    .faq-section {
        margin: 2.5rem 0;
    }
}

/* Use Cases Section */
.use-cases {
    margin: 4rem 0;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.use-case {
    text-align: center;
    padding: 2rem 1.5rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.use-case:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.15);
}

.use-case i {
    font-size: 2.5rem;
    color: #2980b9;
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
}

.use-case:hover i {
    transform: scale(1.1);
}

.use-case h3 {
    margin: 0.5rem 0;
    color: #2c3e50;
    font-size: 1.2rem;
}

/* Benefits Section */
.benefits {
    margin: 4rem 0;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.benefit {
    text-align: center;
    padding: 2rem 1.5rem;
    background: #f8f9fa;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.benefit:hover {
    background: #fff;
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.benefit i {
    font-size: 2.5rem;
    color: #2980b9;
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
}

.benefit:hover i {
    transform: scale(1.1);
}

.benefit h3 {
    margin: 1rem 0 0.75rem;
    color: #2c3e50;
    font-size: 1.2rem;
}

/* FAQ Section */
.faq-section {
    margin: 4rem 0;
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.faq-item {
    background-color: #f8f9fa;
    border-radius: 8px;
    padding: 1.25rem;
    transition: all 0.3s ease;
    border-left: 4px solid #2980b9;
}

.faq-item h3 {
    margin: 0 0 0.75rem 0;
    color: #2c3e50;
    font-size: 1.1rem;
}

.faq-item p {
    margin: 0;
    color: #34495e;
    line-height: 1.6;
}

.faq-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Image Preview Styles */
.image-preview-container {
    margin: 1rem 0;
    display: flex;
    justify-content: center;
    width: 100%;
}

.image-preview-wrapper {
    position: relative;
    max-width: 100%;
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 10px;
    background-color: #f9f9f9;
    display: inline-block;
}

.image-preview {
    max-width: 100%;
    max-height: 300px;
    display: block;
    border-radius: 4px;
}

.remove-image-btn {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 28px;
    height: 28px;
    background-color: #e74c3c;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    font-size: 14px;
    transition: background-color 0.3s ease;
}

.remove-image-btn:hover {
    background-color: #c0392b;
}

.remove-image-btn .remove-icon {
    display: inline-block;
    line-height: 1;
}

.text-copy-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    margin-top: 0.5rem;
}

.result-textarea {
    width: 100%;
    min-height: 120px;
    padding: 0.75rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: vertical;
    font-family: monospace;
    background-color: #f8f9fa;
    margin-bottom: 8px;
}

.copy-btn {
    align-self: flex-end;
    background-color: #2980b9;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 16px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
}

.copy-btn:hover, .qr-copy-btn:hover {
    background-color: #1c5980;
}

.copy-btn.copied, .qr-copy-btn.copied {
    background-color: #27ae60;
}

.flex-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

.flex-grow {
    flex-grow: 1;
}

@media (max-width: 600px) {
    .flex-row {
        flex-direction: column;
        align-items: stretch;
    }
}

footer {
    text-align: center;
    padding: 1rem 0;
    font-size: 0.9rem;
    color: #7f8c8d;
    border-top: 1px solid #ddd;
}