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

html {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

body {
    padding: 20px;
}

/* Container */
.container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 40px;
}

/* Header */
header {
    margin-bottom: 40px;
    text-align: center;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 20px;
}

header h1 {
    font-size: 28px;
    margin-bottom: 10px;
    color: #1a1a1a;
}

.browser-notice {
    font-size: 13px;
    color: #888;
    font-style: italic;
}

/* Sections */
section {
    margin-bottom: 30px;
}

section h2 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #1a1a1a;
}

/* Form Elements */
label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
}

select,
input[type="file"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 14px;
    background-color: white;
}

select:hover,
input[type="file"]:hover {
    border-color: #bbb;
}

select:focus,
input[type="file"]:focus {
    outline: none;
    border-color: #0066cc;
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

select:disabled,
input[type="file"]:disabled {
    background-color: #f5f5f5;
    color: #999;
    cursor: not-allowed;
}

/* Buttons */
button {
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 15px;
}

.primary-btn {
    background-color: #0066cc;
    color: white;
    width: 100%;
}

.primary-btn:hover:not(:disabled) {
    background-color: #0052a3;
}

.primary-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.primary-btn:disabled {
    background-color: #ccc;
    color: #666;
    cursor: not-allowed;
}

.secondary-btn {
    background-color: #f0f0f0;
    color: #333;
    width: 100%;
}

.secondary-btn:hover:not(:disabled) {
    background-color: #e0e0e0;
}

.secondary-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.secondary-btn:disabled {
    background-color: #f5f5f5;
    color: #999;
    cursor: not-allowed;
}

/* Spacing between buttons */
button + button {
    margin-left: 10px;
    width: calc(50% - 5px);
}

/* Version Info */
.version-info {
    background-color: #f5f5f5;
    padding: 12px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 13px;
}

.version-info p {
    margin: 4px 0;
}

/* Loading Spinner */
.loading-spinner {
    text-align: center;
    padding: 40px 20px;
}

.loading-spinner::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #ddd;
    border-top-color: #0066cc;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 10px;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Progress Bar */
.progress-section {
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: 4px;
    border: 1px solid #ddd;
}

.progress-container {
    margin-bottom: 15px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background-color: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #0066cc, #0082ff);
    width: 0%;
    transition: width 0.3s ease;
}

#progress-text {
    font-size: 13px;
    color: #666;
    text-align: center;
}

#status-message {
    font-size: 14px;
    color: #333;
}

/* Device Info */
.device-info-section {
    padding: 20px;
    background-color: #f0f8ff;
    border-left: 4px solid #0066cc;
    border-radius: 4px;
}

.device-info {
    background: white;
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 15px;
    font-size: 13px;
}

.device-info p {
    margin: 8px 0;
}

.device-info strong {
    color: #1a1a1a;
}

.device-info span {
    font-family: 'Courier New', monospace;
    color: #0066cc;
}

/* File Input Wrapper */
.file-input-wrapper {
    margin-bottom: 15px;
}

#flash-local-btn {
    margin-top: 10px;
}

/* Help Text */
.help-text {
    font-size: 13px;
    color: #666;
    margin-bottom: 15px;
}

/* Error Messages */
.error-banner {
    background-color: #fff3cd;
    border: 1px solid #ffc107;
    color: #856404;
    padding: 12px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 14px;
}

.error-banner p {
    margin: 0;
}

.error-text {
    color: #d32f2f;
    font-size: 13px;
    margin-top: 8px;
}

/* Completion Section */
.completion-section {
    background-color: #e8f5e9;
    border-left: 4px solid #4caf50;
    padding: 20px;
    border-radius: 4px;
    text-align: center;
}

#completion-title {
    color: #2e7d32;
    margin-bottom: 15px;
}

#completion-message {
    color: #388e3c;
    margin-bottom: 20px;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 480px) {
    .container {
        padding: 20px;
    }

    header h1 {
        font-size: 24px;
    }

    button + button {
        margin-left: 0;
        width: 100%;
        margin-top: 10px;
    }

    section {
        margin-bottom: 25px;
    }
}

/* Utility Classes */
[hidden] {
    display: none !important;
}