:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --success-color: #16a34a;
    --warning-color: #ea580c;
    --error-color: #dc2626;
    --bg-color: #f8fafc;
    --text-color: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --input-bg: #ffffff;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
        Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 0 20px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
}

main {
    flex: 1;
}

/* Form Styles */
.form-section {
    background: white;
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.form-section h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.form-section h3 {
    font-size: 1.1rem;
    margin-top: 25px;
    margin-bottom: 15px;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

input[type="email"],
input[type="password"],
input[type="number"] {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background-color: var(--input-bg);
    color: var(--text-color);
    transition:
        border-color 0.2s,
        box-shadow 0.2s;
}

input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input::placeholder {
    color: var(--text-light);
}

small {
    display: block;
    margin-top: 5px;
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Button Styles */
.button-group {
    display: flex;
    gap: 10px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

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

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

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #475569;
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* Status Messages */
.status-area {
    padding: 15px 20px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-weight: 500;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.status-info {
    background-color: #dbeafe;
    color: #1e40af;
    border-left: 4px solid #2563eb;
}

.status-success {
    background-color: #dcfce7;
    color: #166534;
    border-left: 4px solid #16a34a;
}

.status-warning {
    background-color: #fed7aa;
    color: #92400e;
    border-left: 4px solid #ea580c;
}

.status-error {
    background-color: #fee2e2;
    color: #991b1b;
    border-left: 4px solid #dc2626;
}

.hidden {
    display: none !important;
}

/* Firmware Guide Section */
.firmware-guide {
    margin-top: 25px;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: #f9fafb;
    cursor: pointer;
}

.firmware-guide summary {
    font-weight: 600;
    color: var(--primary-color);
    user-select: none;
    padding: 5px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.firmware-guide summary:hover {
    color: var(--primary-dark);
}

.firmware-guide summary::marker {
    color: var(--primary-color);
}

.guide-content {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.guide-content > p {
    margin-bottom: 20px;
    color: var(--text-color);
    line-height: 1.6;
}

.guide-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 20px 0;
}

.guide-step {
    text-align: center;
}

.guide-step h4 {
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 12px;
    font-weight: 600;
}

.guide-image {
    max-width: 400px;
    height: auto;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition:
        transform 0.2s,
        box-shadow 0.2s;
}

.guide-image:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.guide-note {
    margin-top: 20px;
    padding: 12px;
    background-color: #fffbeb;
    border-left: 4px solid #f59e0b;
    color: #92400e;
    font-size: 0.9rem;
    border-radius: 4px;
}

/* Output Section */
.output-section {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.output-area {
    animation: slideIn 0.3s ease-out;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.output-header h2 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin: 0;
}

.json-output {
    background-color: #1e293b;
    color: #e2e8f0;
    padding: 20px;
    border-radius: 6px;
    overflow-x: auto;
    font-family: "Monaco", "Courier New", monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    max-height: 600px;
    overflow-y: auto;
}

/* Footer */
footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
}

.disclaimer {
    background-color: #f0fdf4;
    padding: 15px;
    border-radius: 6px;
    border-left: 4px solid #16a34a;
    text-align: left;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 2rem;
    }

    .form-section,
    .output-section {
        padding: 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .output-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .output-header .btn {
        width: auto;
    }

    .json-output {
        font-size: 0.85rem;
        max-height: 400px;
    }

    .guide-images {
        grid-template-columns: 1fr;
    }

    .firmware-guide {
        padding: 15px;
    }

    .guide-content {
        padding-top: 15px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

    .form-section,
    .output-section {
        padding: 15px;
    }

    .form-section h2,
    .output-header h2 {
        font-size: 1.2rem;
    }

    .form-section h3 {
        font-size: 1rem;
    }

    .subtitle {
        font-size: 1rem;
    }
}