/* --- Глобальні стилі та змінні --- */
:root {
    --primary-color: #007bff;
    --secondary-color: #f8f9fa;
    --text-color: #333;
    --border-color: #dee2e6;
    --success-color: #28a745;
    --premium-color: #8E44AD;
    --standart-color: #3498DB;
    --econom-color: #2ECC71;
    --white-color: #fff;
    --shadow: 0 4px 8px rgba(0,0,0,0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    background-color: var(--secondary-color);
    color: var(--text-color);
    padding: 20px;
}

.container {
    max-width: 1100px;
    margin: auto;
    background: var(--white-color);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

/* --- Заголовки та текст --- */
header h1 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 0.5rem;
}

header p {
    text-align: center;
    margin-bottom: 2rem;
    color: #6c757d;
}

h2 {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

/* --- Секції --- */
.analysis-section, .results-section {
    margin-bottom: 2rem;
}

/* --- Форма --- */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.form-group input[type="number"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.checkbox-group {
    display: flex;
    align-items: center;
    padding-top: 1.8rem; /* Вирівнювання з інпутами */
}

.checkbox-group input[type="checkbox"] {
    margin-right: 0.75rem;
    width: 1.2em;
    height: 1.2em;
}

#calculate-btn {
    display: block;
    width: 100%;
    padding: 1rem;
    margin-top: 2rem;
    background-color: var(--success-color);
    color: var(--white-color);
    border: none;
    border-radius: 5px;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

#calculate-btn:hover {
    background-color: #218838;
}

/* --- Результати --- */
#results-container {
    padding-top: 1rem;
}

.hidden {
    display: none;
}

#results-placeholder, #no-results, #loading-indicator {
    text-align: center;
    color: #6c757d;
    padding: 2rem;
    border: 2px dashed var(--border-color);
    border-radius: 5px;
}

.scheme-card {
    background: var(--white-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--secondary-color);
    border-bottom: 1px solid var(--border-color);
}

.card-header h3 {
    margin: 0;
}

.segment-badge {
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    color: var(--white-color);
    font-size: 0.9rem;
    font-weight: bold;
}

.segment-badge.premium { background-color: var(--premium-color); }
.segment-badge.standart { background-color: var(--standart-color); }
.segment-badge.econom { background-color: var(--econom-color); }

.card-body {
    display: flex;
    padding: 1.5rem;
    gap: 1.5rem;
}

.card-body img {
    max-width: 150px;
    height: auto;
    object-fit: contain;
    border-radius: 5px;
}

.card-info {
    flex-grow: 1;
}

.card-info h4 {
    margin-bottom: 0.5rem;
}

.card-info ul {
    list-style-position: inside;
    padding-left: 0;
    margin-bottom: 1rem;
}

.order-btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: var(--white-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    font-weight: bold;
    margin-top: 1rem;
}

.order-btn:hover {
    background-color: #0056b3;
}

.ro-recommendation {
    border: 2px solid var(--standart-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    background-color: #eaf4ff;
}

/* --- Адаптивність --- */
@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    .card-body {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .container {
        padding: 1rem;
    }
}