/* =========================================
   ИМПОРТ ФИРМЕННОГО ШРИФТА
   ========================================= */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600&display=swap');

/* =========================================
   БАЗОВЫЕ НАСТРОЙКИ И ПЕРЕМЕННЫЕ
   ========================================= */
:root {
    --brand-green: #06B3A5;        /* Фирменный цвет из брендбука */
    --brand-green-hover: #059a8e;  /* Чуть темнее для наведения */
    --text-main: #373435;          /* Основной темно-серый цвет текста */
    --text-dark: #303030;          /* Дополнительный темный оттенок */
    --text-muted: #888888;         /* Серый для неактивных элементов */
    --bg-light: #f9fafb;           /* Светло-серый фон для плашек */
    --border-color: #e5e7eb;       /* Цвет обводок */
    --danger-color: #E21836;       /* Строгий красный для ошибок */
    --success-color: #06B3A5;      /* Фирменный цвет для успеха */
}

* {
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
}

body {
    margin: 0;
    padding: 20px;
    background-color: transparent; 
    color: var(--text-main);
    font-size: 16px;
    line-height: 1.5;
    font-weight: 400;
}

/* =========================================
   ГЛАВНЫЙ КОНТЕЙНЕР
   ========================================= */
.calc-container {
    max-width: 800px;
    margin: 0 auto;
    background: #FFFFFF;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(55, 52, 53, 0.08); 
    overflow: hidden;
    border: 1px solid var(--border-color);
}

/* =========================================
   ВКЛАДКИ (TABS)
   ========================================= */
.tabs {
    display: flex;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 20px 15px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-weight: 500;
    font-size: 15px;
    color: var(--text-muted);
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
}

.tab-btn:hover {
    color: var(--text-main);
    background: #f3f4f6;
}

.tab-btn.active {
    background: #FFFFFF;
    color: var(--text-main);
    font-weight: 600;
    border-bottom: 3px solid var(--brand-green);
}

.tab-content {
    display: none;
    padding: 35px 40px;
    animation: fadeIn 0.4s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =========================================
   ИНФОРМАЦИОННЫЕ ПЛАШКИ (ALERTS)
   ========================================= */
.alert {
    padding: 16px 20px;
    border-radius: 6px;
    margin-bottom: 25px;
    font-size: 14px;
    line-height: 1.6;
    font-weight: 400;
}

.alert-warning {
    background: #fffbef;
    border-left: 4px solid #f59e0b;
    color: var(--text-main);
}

.alert-info {
    background: #f0fdfc;
    border-left: 4px solid var(--brand-green);
    color: var(--text-main);
}

/* =========================================
   ЭЛЕМЕНТЫ ФОРМЫ
   ========================================= */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
    color: var(--text-dark);
    font-size: 15px;
}

.form-group input[type="number"], 
.form-group input[type="date"], 
.form-group input[type="text"], 
.form-group input[type="tel"], 
.form-group select {
    width: 100%;
    padding: 14px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 15px;
    color: var(--text-main);
    transition: border-color 0.3s, box-shadow 0.3s;
    background-color: #FFFFFF;
    font-family: 'Montserrat', sans-serif;
}

.form-group input:focus, 
.form-group select:focus {
    outline: none;
    border-color: var(--brand-green);
    box-shadow: 0 0 0 3px rgba(6, 179, 165, 0.15);
}

.form-group input[type="range"] {
    width: 100%;
    margin: 15px 0;
    accent-color: var(--brand-green);
    cursor: pointer;
}

/* Сетка чекбоксов (Дефекты) */
.checks-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px 20px;
    background: var(--bg-light);
    padding: 25px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.checks-grid .full-width {
    grid-column: span 2;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
    font-weight: 600;
}

.checks-grid label {
    font-weight: 400;
    font-size: 14px;
    display: flex;
    align-items: flex-start;
    color: var(--text-main);
    cursor: pointer;
}

.checks-grid input[type="checkbox"] {
    margin-right: 12px;
    margin-top: 2px;
    width: 18px;
    height: 18px;
    accent-color: var(--brand-green);
    cursor: pointer;
}

/* =========================================
   КНОПКИ
   ========================================= */
.btn-calc, .btn-action {
    width: 100%;
    padding: 18px;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: 'Montserrat', sans-serif;
}

.btn-calc {
    background: var(--brand-green);
    color: #FFFFFF;
    margin-bottom: 20px;
}

.btn-calc:hover {
    background: var(--brand-green-hover);
    box-shadow: 0 4px 15px rgba(6, 179, 165, 0.3);
}

.btn-action {
    background: var(--text-dark);
    color: #FFFFFF;
}

.btn-action:hover {
    background: var(--text-main);
    box-shadow: 0 4px 15px rgba(55, 52, 53, 0.3);
}

/* =========================================
   БЛОК С РЕЗУЛЬТАТАМИ
   ========================================= */
.result-box {
    background: #FFFFFF;
    border: 2px solid var(--brand-green);
    border-radius: 8px;
    padding: 30px;
    margin-top: 15px;
}

.result-box p {
    font-size: 16px;
    margin: 0 0 15px 0;
    font-weight: 500;
}

.result-box p:last-of-type {
    margin-bottom: 25px;
}

.result-box strong {
    color: var(--brand-green);
    font-size: 22px;
    display: block;
    margin-top: 8px;
    font-weight: 600;
}

.result-box ul {
    margin-top: 0;
    padding-left: 20px;
    margin-bottom: 25px;
}

.result-box li {
    margin-bottom: 12px;
    color: var(--text-main);
    font-size: 15px;
}

.result-box li strong {
    display: inline;
    font-size: 16px;
    color: var(--text-main);
}

.hidden {
    display: none !important;
}

/* =========================================
   МОДАЛЬНОЕ ОКНО (POPUP)
   ========================================= */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(55, 52, 53, 0.85); 
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: #FFFFFF;
    padding: 45px 40px;
    border-radius: 8px;
    max-width: 450px;
    width: 90%;
    position: relative;
    box-shadow: 0 15px 40px rgba(0,0,0,0.25);
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.3s;
}

.close-btn:hover {
    color: var(--brand-green);
}

/* =========================================
   АДАПТИВНОСТЬ (MOBILE)
   ========================================= */
@media (max-width: 768px) {
    .tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        border-bottom: 1px solid var(--border-color);
        border-left: 3px solid transparent;
        padding: 15px;
    }

    .tab-btn.active {
        border-bottom: 1px solid var(--border-color);
        border-left: 3px solid var(--brand-green);
    }
    
    .checks-grid {
        grid-template-columns: 1fr;
    }
    
    .tab-content {
        padding: 25px 20px;
    }
}