* {
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f3f4f6;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: auto;
}


.app-header {
    text-align: center;
    margin-bottom: 25px;
}

.app-header h1 {
    font-size: 28px;
    margin-bottom: 5px;
}

.app-header p {
    color: #555;
}


.settings-card {
    background: white;
    border-radius: 14px;
    padding: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,.08);
    margin-bottom: 30px;
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 15px;
    align-items: end;
}

label {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
    display: block;
}

input, select {
    width: 100%;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid #ccc;
    font-size: 15px;
}

.primary-btn {
    padding: 12px 20px;
    font-size: 16px;
    border-radius: 10px;
    background: #6366f1;
    color: white;
    border: none;
    cursor: pointer;
}

.primary-btn:hover {
    background: #4f46e5;
}


.task-types {
    margin-top: 20px;
}

.task-types summary {
    cursor: pointer;
    font-weight: 600;
    padding: 10px 0;
}

.task-types summary span {
    background: #6366f1;
    color: white;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    margin-left: 8px;
}

.task-types-actions {
    margin: 10px 0;
    display: flex;
    gap: 10px;
}

.task-types-actions button {
    padding: 6px 12px;
    border-radius: 8px;
    border: 1px solid #c7d2fe;
    background: #eef2ff;
    cursor: pointer;
    font-size: 14px;
}

.task-types-actions button:hover {
    background: #e0e7ff;
}


.type-group {
    margin-bottom: 16px;
}

.type-group-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
    color: #555;
}

.type-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.type-tag {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 14px;
    cursor: pointer;
    border: 1px solid #c7d2fe;
    background: #eef2ff;
    color: #3730a3;
    transition: all .2s ease;
    user-select: none;
}

.type-tag:hover {
    background: #e0e7ff;
}

.type-tag.active {
    background: #4f46e5;
    color: white;
    border-color: #4f46e5;
}


.task {
    background: white;
    border-radius: 14px;
    padding: 22px;
    margin-bottom: 25px;
    box-shadow: 0 8px 20px rgba(0,0,0,.08);
}

.task-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
}

.task-number {
    font-weight: 700;
    color: #4f46e5;
}

.task-type {
    font-size: 13px;
    background: #eef2ff;
    color: #4338ca;
    padding: 4px 12px;
    border-radius: 20px;
}

.question {
    font-size: 18px;
    margin-bottom: 15px;
}


.answer-section {
    background: #ecfdf5;
    border-left: 4px solid #10b981;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 15px;
}

.answer-value {
    font-size: 22px;
    font-weight: 700;
}


.solution-section {
    background: #fff7ed;
    border-left: 4px solid #fb923c;
    padding: 15px;
    border-radius: 8px;
}

.solution-title {
    font-weight: 700;
    margin-bottom: 10px;
}

.step {
    margin-bottom: 6px;
    padding-left: 14px;
    position: relative;
}

.step::before {
    content: "•";
    position: absolute;
    left: 0;
}


.loading {
    text-align: center;
    display: none;
    margin: 30px 0;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 4px solid #ddd;
    border-top: 4px solid #6366f1;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: auto;
}

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


@media (max-width: 768px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }
}