:root {
    --primary-color: #2196F3;
    --success-color: #4CAF50;
    --warning-color: #FFC107;
    --error-color: #F44336;
    --text-color: #333;
    --background-color: #f5f5f5;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    text-align: center;
}

.logo {
    height: 50px;
    width: auto;
}

.header h1 {
    margin: 0;
    color: var(--text-color);
    font-size: 1.75rem;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.primary-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 5px;
    cursor: pointer;
    display: block;
    margin: 2rem auto;
    transition: background-color 0.3s;
}

.primary-button:hover {
    background-color: #1976D2;
}

.progress-bar {
    height: 4px;
    background-color: #e0e0e0;
    border-radius: 2px;
    margin: 2rem 0;
}

.progress {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 2px;
    width: 0;
    transition: width 0.3s ease;
}

.checklist {
    margin: 2rem 0;
}

.check-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    margin: 0.5rem 0;
    background: #f8f9fa;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.check-item .icon {
    width: 24px;
    height: 24px;
    margin-right: 1rem;
    border-radius: 50%;
    display: inline-block;
    position: relative;
}

.check-item.pending .icon {
    border: 2px solid #ccc;
}

.check-item.checking .icon {
    border: 2px solid var(--primary-color);
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

.check-item.success .icon::before {
    content: "✓";
    color: white;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.check-item.success .icon {
    background-color: var(--success-color);
}

.check-item.error .icon {
    background-color: var(--error-color);
}

.check-item.error .icon::before {
    content: "✕";
    color: white;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.check-item.warning .icon {
    background-color: var(--warning-color);
}

.check-item.warning .icon::before {
    content: "!";
    color: white;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    font-weight: bold;
}

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

#result-message {
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
    border-radius: 5px;
}

#result-message.success {
    background-color: #E8F5E9;
    color: var(--success-color);
}

#result-message.error {
    background-color: #FFEBEE;
    color: var(--error-color);
}

#result-message.error a {
    color: var(--error-color);
    text-decoration: underline;
}

#result-message.error a:hover {
    opacity: 0.8;
}

.program-selection {
    margin: 2rem 0;
    text-align: center;
}

.program-select {
    padding: 0.75rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    width: 100%;
    max-width: 300px;
    margin-top: 0.5rem;
}

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

.description {
    text-align: center;
    margin-bottom: 2rem;
}

.description a {
    color: var(--primary-color);
    text-decoration: none;
}

.description a:hover {
    text-decoration: underline;
}

.check-item.suggestion {
    background: none;
    font-style: italic;
    color: #666;
    padding-left: 0;
}

.check-item.suggestion .icon {
    display: none;
}

.check-item.suggestion a {
    color: var(--primary-color);
    text-decoration: none;
}

.check-item.suggestion a:hover {
    text-decoration: underline;
}

.secondary-button {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 5px;
    cursor: pointer;
    display: block;
    margin: 2rem auto;
    transition: all 0.3s;
}

.secondary-button:hover {
    background-color: var(--primary-color);
    color: white;
}