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

html,
body {
    font-family: var(--font-rubik), 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: white;
    background-color: rgb(25, 25, 32);
    max-width: 100vw;
    overflow-x: hidden;
    margin: 0.5rem;
    margin-bottom: 1.5rem;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.welcome-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.welcome-card h1 {
    color: white;
    margin-bottom: 15px;
    font-size: 2.5em;
}

.welcome-card p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1em;
    max-width: 600px;
    margin: 0 auto;
}

.exercise-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.exercise-header {
    padding: 25px;
    background: #3498db;
    color: white;
}

.exercise-header h2 {
    margin-bottom: 10px;
    font-size: 1.4em;
}

.exercise-header p {
    opacity: 0.9;
    font-size: 1.05em;
}

.exercise-content {
    padding: 25px;
    background: rgba(255, 255, 255, 0.02);
}

.code-editor-container {
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
}

.CodeMirror {
    height: 150px;
    font-size: 14px;
}

.button-container {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

button {
    border: none;
    font-family: inherit;
    border-radius: 5px;
    font-size: 1rem;
    padding: 0.4rem 0;
    transition: background-color 80ms !important;
}

button:not(:disabled) {
    cursor: pointer;
}

.check-button {
    background: #27ae60;
    color: white;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    flex: 0 0 80%;
}

.check-button:hover {
    background: #229954;
}

.check-button:disabled {
    background: #95a5a6;
    cursor: not-allowed;
}

.hint-button {
    background: #f39c12;
    color: white;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    flex: 1;
}

.hint-button:hover {
    background: #e67e22;
}

.feedback {
    padding: 15px;
    border-radius: 4px;
    margin-top: 10px;
    font-weight: 500;
}

.feedback.success {
    background: rgba(39, 174, 96, 0.15);
    color: #2ecc71;
    border-left: 4px solid #27ae60;
}

.feedback.error {
    background: rgba(231, 76, 60, 0.15);
    color: #e74c3c;
    border-left: 4px solid #e74c3c;
}

.feedback.hint {
    background: rgba(255, 193, 7, 0.15);
    color: #f39c12;
    border-left: 4px solid #ffc107;
}

.feedback h4 {
    margin-bottom: 8px;
}

.feedback ul {
    margin-left: 20px;
}

.feedback li {
    margin-bottom: 5px;
}

a {
    color: rgb(101, 203, 232);
}

footer {
    text-align: center;
    color: rgb(159, 159, 200);
}

.yaml-primer {
    margin-top: 25px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.yaml-primer h3 {
    margin-bottom: 15px;
    color: rgb(101, 203, 232);
    text-align: center;
}

.primer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.primer-item {
    text-align: left;
    padding: 10px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 4px;
    border-left: 3px solid rgb(101, 203, 232);
}

.primer-item strong {
    display: block;
    margin-bottom: 5px;
    color: rgba(255, 255, 255, 0.9);
}

.primer-item code {
    display: block;
    background: rgba(0, 0, 0, 0.3);
    padding: 8px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    color: #a8e6cf;
    white-space: pre;
}