/* --- Стили для Калькулятора Краски (Cyan/Teal Theme) --- */
:root {
    --accent-cyan: #06B6D4;
    --accent-cyan-dark: #0891B2;
    --gradient-cyan-card: linear-gradient(135deg, #22D3EE 0%, #06B6D4 100%);
}

.calc-header { margin-bottom: 32px; }
.subtitle { color: var(--text-secondary); margin-top: 8px; }

/* Сетка */
.calc-grid { display: grid; grid-template-columns: 1fr; gap: 24px; align-items: start; }
@media (min-width: 900px) { .calc-grid { grid-template-columns: 1.2fr 0.8fr; } }

/* Результаты (Cyan Card) */
.card--cyan { background: var(--gradient-cyan-card); color: #fff; border: none; }
.card--cyan h2 { color: rgba(255,255,255,0.9); margin-bottom: 24px; }
@media (min-width: 900px) { .sticky-card { position: sticky; top: 24px; } }

/* Ведро */
.paint-bucket-visual { display: flex; align-items: center; gap: 20px; margin-bottom: 32px; }
.bucket-icon {
    width: 80px; height: 80px; background: rgba(255,255,255,0.2);
    border-radius: 20px; display: flex; align-items: center; justify-content: center; backdrop-filter: blur(4px);
}
.bucket-val { display: flex; flex-direction: column; }
.bucket-val span { font-size: 48px; font-weight: 800; line-height: 1; }
.bucket-val small { font-size: 18px; opacity: 0.8; }

.result-details { display: flex; flex-direction: column; gap: 12px; }
.detail-row { display: flex; justify-content: space-between; font-size: 14px; border-bottom: 1px solid rgba(255,255,255,0.2); padding-bottom: 8px; }

.tip-box {
    background: rgba(0,0,0,0.15); padding: 12px 16px; border-radius: 12px;
    display: flex; gap: 12px; font-size: 13px; line-height: 1.4; margin-bottom: 20px;
}
.total-with-reserve {
    display: flex; justify-content: space-between; align-items: center;
    background: #fff; color: var(--accent-cyan-dark); padding: 16px; border-radius: 12px; font-weight: 600;
}
.total-with-reserve strong { font-size: 20px; }

/* --- INPUTS И РЕЖИМЫ (FIXED HEIGHT 54px) --- */
.calc-inputs { gap: 24px; }
.input-group { margin-bottom: 24px; }
.input-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
.input-wrapper { position: relative; display: flex; align-items: center; }

/* Поля ввода */
.input-wrapper input {
    width: 100%; 
    height: 54px; 
    padding: 0 40px 0 16px; 
    font-size: 18px; font-weight: 500;
    border: 1px solid #E5E7EB; border-radius: 12px;
    outline: none; transition: border 0.2s, box-shadow 0.2s;
    font-family: var(--font-main);
    box-sizing: border-box; 
}
.input-wrapper input:focus { border-color: var(--accent-cyan); box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1); }
.suffix { position: absolute; right: 16px; color: var(--text-secondary); pointer-events: none; }
.helper-text { font-size: 12px; color: var(--text-secondary); margin-top: 6px; }

.row-3-col { display: grid; grid-template-columns: 1fr; gap: 20px; }
@media (min-width: 600px) { .row-3-col { grid-template-columns: repeat(3, 1fr); } }
.row-2-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* Табы */
.mode-switcher {
    display: flex; background: #F3F4F6; padding: 4px;
    border-radius: 12px; margin-bottom: 24px; gap: 4px;
}
.mode-btn {
    flex: 1; padding: 10px 4px; border: none; background: transparent;
    color: var(--text-secondary); font-size: 13px; font-weight: 600;
    border-radius: 8px; cursor: pointer; transition: all 0.2s; text-align: center;
}
.mode-btn.active { background: #fff; color: var(--text-primary); box-shadow: 0 2px 8px rgba(0,0,0,0.05); }

/* Счетчики */
.openings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.opening-item {
    background: #F9FAFB; border: 1px solid #E5E7EB; border-radius: 12px;
    padding: 12px; display: flex; flex-direction: column; gap: 8px;
}
.opening-item span { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.counter {
    display: flex; align-items: center; background: #fff;
    border-radius: 8px; border: 1px solid #E5E7EB; overflow: hidden; height: 40px;
}
.cnt-btn {
    width: 32px; height: 100%; border: none; background: #F3F4F6;
    cursor: pointer; font-weight: bold; color: var(--text-primary);
}
.cnt-btn:hover { background: #E5E7EB; }
.counter input {
    width: 100%; height: 100%; text-align: center; border: none; font-weight: 600;
    font-size: 14px; outline: none; color: var(--text-primary); padding: 0;
}

/* Радио-сегмент */
.radio-segment {
    display: flex; background: #F3F4F6; border-radius: 12px; padding: 4px; gap: 4px;
    height: 54px; box-sizing: border-box;
}
.radio-segment label { flex: 1; position: relative; cursor: pointer; display: flex; height: 100%; }
.radio-segment input { display: none; }
.radio-segment span {
    width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
    border-radius: 8px; font-size: 14px; font-weight: 600; color: var(--text-secondary); transition: all 0.2s;
    line-height: 1; padding: 0;
}
.radio-segment input:checked + span {
    background: #fff; color: var(--accent-cyan-dark); box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.checkbox-row { display: flex; align-items: center; gap: 12px; cursor: pointer; margin-top: 16px; }
.checkbox-row input { display: none; }
.checkbox-box {
    width: 24px; height: 24px; border: 2px solid #D1D5DB; border-radius: 6px;
    display: flex; align-items: center; justify-content: center; color: transparent; transition: all 0.2s;
}
.checkbox-row input:checked + .checkbox-box { background: var(--accent-cyan); border-color: var(--accent-cyan); color: #fff; }
.checkbox-row span:last-child { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.divider { border: 0; border-top: 1px solid #E5E7EB; margin: 24px 0; }


/* --- НОВЫЕ ИНФОРМАЦИОННЫЕ БЛОКИ --- */

.info-wrapper {
    padding: 60px 0 60px 0;
    margin-top: 60px;
    border-top: 1px solid rgba(0,0,0,0.06);
    margin-bottom: 20px;
}

.info-wrapper .container {
    max-width: 800px;
    margin: 0 auto;
}

/* Заголовки с иконками */
.icon-heading {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.3;
}

.header-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
    flex-shrink: 0;
    margin-top: -4px;
}

.header-icon svg { width: 24px; height: 24px; stroke-width: 2px; }

/* Цвета иконок */
.blue-icon svg { color: #2563EB; }
.orange-icon svg { color: #F59E0B; }
.green-icon svg { color: #10B981; }
.red-icon svg { color: #EF4444; }

/* Маленькие подзаголовки */
.small-heading {
    margin-top: 40px;
    margin-bottom: 16px;
    font-size: 20px;
}
.small-heading .header-icon { width: 40px; height: 40px; }
.small-heading .header-icon svg { width: 20px; height: 20px; }

.intro-text {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

/* --- Секция Формул --- */
.formulas-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 48px;
}

.formula-card {
    background: #fff;
    border: 1px solid rgba(0,0,0,0.04);
    box-shadow: var(--shadow-soft);
    border-radius: var(--radius-lg); 
    padding: 24px;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex;
    flex-direction: column;
}
.formula-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }

/* Вертикальный хедер (бейдж сверху) */
.formula-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.formula-card h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

/* Бейджи */
.badge-blue {
    background: #2563EB; color: #fff;
    padding: 6px 12px; border-radius: 99px;
    font-size: 11px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.05em;
    display: inline-block;
}
.badge-green {
    background: #10B981; color: #fff;
    padding: 6px 12px; border-radius: 99px;
    font-size: 11px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.05em;
    display: inline-block;
}

.formula-card p {
    font-size: 14px; color: var(--text-secondary);
    margin: 0; line-height: 1.5; font-weight: 500;
}

.math-expression {
    background: #F9FAFB;
    border: 1px solid #E5E7EB;
    padding: 12px 16px;
    border-radius: 12px;
    font-weight: 700;
    color: var(--accent-cyan-dark); /* Акцент под тему Paint */
    text-align: center;
    margin-bottom: 16px;
    font-size: 15px;
}

/* Разделитель */
.soft-divider {
    border: none; height: 1px;
    background: linear-gradient(90deg, transparent, #E5E7EB, transparent);
    margin: 48px 0;
}

/* Описание */
.calc-description p {
    font-size: 16px; line-height: 1.7;
    color: var(--text-secondary); margin-bottom: 24px;
}
.calc-description strong { color: var(--text-primary); }

/* FAQ (Стиль Paint) */
.faq-paint-style .faq-item {
    background: #fff; border: 1px solid #E5E7EB;
    border-radius: 12px; margin-bottom: 12px;
    overflow: hidden; transition: all 0.2s ease;
}

.faq-paint-style .faq-item[open] {
    border-color: var(--accent-cyan); 
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.1);
}

.faq-paint-style summary.faq-question {
    padding: 16px 20px; cursor: pointer;
    font-weight: 600; color: var(--text-primary);
    list-style: none; position: relative;
    display: flex; justify-content: space-between;
    align-items: center; transition: background 0.2s;
}

.faq-paint-style summary.faq-question:hover { background-color: #F9FAFB; }

.faq-paint-style .faq-item[open] summary.faq-question {
    color: var(--accent-cyan-dark);
    background: #ECFEFF; /* Светлый циан */
}

.faq-question::after {
    content: '+'; font-size: 20px;
    color: var(--text-secondary); font-weight: 400; line-height: 1;
}
.faq-question .icon-plus { display: none; }

.faq-paint-style .faq-item[open] summary.faq-question::after {
    content: '−'; color: var(--accent-cyan);
}

.faq-answer {
    padding: 20px; color: var(--text-secondary);
    line-height: 1.6; font-size: 15px;
}

/* --- МОБИЛЬНАЯ АДАПТАЦИЯ --- */
@media (max-width: 900px) {
    /* Сетка в 1 колонку */
    .formulas-grid { grid-template-columns: 1fr; gap: 16px; margin-bottom: 32px; }
    
    /* Уменьшаем шрифты */
    .icon-heading { font-size: 20px; gap: 12px; margin-bottom: 20px; }
    .header-icon { width: 40px; height: 40px; border-radius: 12px; }
    .header-icon svg { width: 20px; height: 20px; }
    
    /* Центрирование контента карточки */
    .formula-card { 
        padding: 24px; 
        text-align: center; 
        align-items: center; 
    }

    .formula-header {
        align-items: center;
        width: 100%;
    }

    /* Блок с формулой по центру */
    .math-expression {
        width: 100%;
        max-width: 300px;
        margin-left: auto;
        margin-right: auto;
    }

    .info-wrapper { margin-top: 40px; padding-top: 40px; }
}