/* --- Стили для Калькулятора Подписок (Violet Theme) --- */
:root {
    --accent-violet: #7C3AED;
    --accent-violet-light: #F5F3FF;
    --gradient-violet-card: linear-gradient(135deg, #8B5CF6 0%, #7C3AED 100%);
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --radius-lg: 16px;
    --font-main: 'Inter', sans-serif;
}

.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; } }

/* Глобальные инпуты */
.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; }

.input-wrapper input {
    width: 100%; padding: 16px; padding-right: 40px;
    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); background: #fff;
}
.input-wrapper input:focus { border-color: var(--accent-violet); box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1); }
.currency { position: absolute; right: 16px; color: var(--text-secondary); pointer-events: none; }

.divider { border: 0; border-top: 1px solid #E5E7EB; margin: 24px 0; }

/* --- СПИСОК ПОДПИСОК (АДАПТИВНЫЙ) --- */
.sub-row {
    display: grid;
    /* Desktop: Название | Цена | Период | Удалить */
    grid-template-columns: 1fr 110px 90px 42px;
    gap: 10px;
    margin-bottom: 12px;
    animation: fadeIn 0.3s ease;
    align-items: center;
}

/* Мобильная версия списка: 2 этажа */
@media (max-width: 600px) {
    .sub-row {
        grid-template-columns: 1fr 90px 42px; /* Цена | Период | Удалить */
        grid-template-areas: 
            "name name name"
            "price period delete";
        gap: 8px;
        background: #F9FAFB;
        padding: 10px;
        border-radius: 12px;
        border: 1px solid #F3F4F6;
    }

    .sub-name-wrap { grid-area: name; }
    .sub-price-wrap { grid-area: price; }
    .sub-period-wrap { grid-area: period; }
    .sub-delete-wrap { grid-area: delete; }
}

/* Стили элементов списка */
.sub-row .input-wrapper input,
.sub-row .select-wrapper select {
    height: 46px;
    font-size: 15px;
    padding-top: 0; padding-bottom: 0;
}
.sub-row .input-wrapper input { padding-left: 12px; padding-right: 12px; }

/* Выпадающий список (Select) */
.select-wrapper { position: relative; width: 100%; height: 100%; }
.select-wrapper select {
    width: 100%; height: 100%;
    appearance: none; -webkit-appearance: none; -moz-appearance: none;
    background: #fff;
    border: 1px solid #E5E7EB; border-radius: 12px;
    padding: 0 28px 0 10px;
    font-size: 14px; color: var(--text-primary);
    outline: none; cursor: pointer;
    font-family: var(--font-main);
}
.select-wrapper select:focus { border-color: var(--accent-violet); }
.select-arrow {
    position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
    pointer-events: none; color: var(--text-secondary); display: flex;
}

/* Кнопка удаления */
.btn-icon-only {
    width: 100%; height: 46px;
    display: flex; align-items: center; justify-content: center;
    background: #fff; border: 1px solid #E5E7EB;
    color: #9CA3AF; cursor: pointer;
    transition: 0.2s; border-radius: 12px;
}
.btn-icon-only:hover { color: #EF4444; background: #FEF2F2; border-color: #FECACA; }

/* Кнопка добавления */
.btn-add-row {
    width: 100%; padding: 14px;
    border: 2px dashed #E5E7EB; border-radius: 12px;
    background: transparent; color: var(--text-secondary);
    font-weight: 600; cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: 8px;
    transition: 0.2s;
}
.btn-add-row:hover { border-color: var(--accent-violet); color: var(--accent-violet); background: var(--accent-violet-light); }

/* --- РЕЗУЛЬТАТЫ --- */
.card--violet { background: var(--gradient-violet-card); color: #fff; border: none; }
.card--violet h2 { color: rgba(255,255,255,0.95); margin-bottom: 24px; }
@media (min-width: 900px) { .sticky-card { position: sticky; top: 24px; } }

.fuel-price-big { font-size: 56px; font-weight: 800; line-height: 1; margin-bottom: 32px; display: flex; align-items: baseline; gap: 8px; }
.fuel-price-big small { font-size: 24px; opacity: 0.8; font-weight: 600; }

.fuel-visual { background: rgba(255,255,255,0.15); border-radius: 16px; padding: 16px; display: flex; align-items: center; gap: 16px; backdrop-filter: blur(4px); margin-bottom: 16px; }
.fuel-icon { font-size: 0; }
.fuel-info { display: flex; flex-direction: column; }
.fuel-info span { font-size: 13px; opacity: 0.9; }
.fuel-info strong { font-size: 20px; font-weight: 700; }

.split-cost-box { background: #fff; border-radius: 12px; padding: 16px; color: var(--accent-violet); animation: fadeIn 0.3s ease; }
.split-label { font-size: 12px; color: #5B21B6; margin-bottom: 4px; text-transform: uppercase; font-weight: 700; opacity: 0.7; }
.split-value { font-size: 24px; font-weight: 800; }

.summary-divider { height: 1px; background: rgba(255,255,255,0.2); margin: 24px 0; }
.tip-box { font-size: 13px; opacity: 0.9; line-height: 1.5; }

/* --- НИЖНИЙ БЛОК (ТОЧНАЯ КОПИЯ ИЗ FUEL.CSS) --- */
.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; }

.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; }
.blue-icon svg { color: #2563EB; }
.orange-icon svg { color: #F59E0B; }
.red-icon svg { color: #E11D48; }

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

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

.badge-blue { background: #2563EB; color: #fff; padding: 6px 12px; border-radius: 99px; font-size: 11px; font-weight: 700; text-transform: uppercase; }
.badge-green { background: #10B981; color: #fff; padding: 6px 12px; border-radius: 99px; font-size: 11px; font-weight: 700; text-transform: uppercase; }

.math-expression { background: #F9FAFB; border: 1px solid #E5E7EB; padding: 12px 16px; border-radius: 12px; font-weight: 700; color: var(--accent-violet); text-align: center; margin-bottom: 16px; font-size: 15px; }
.soft-divider { border: none; height: 1px; background: linear-gradient(90deg, transparent, #E5E7EB, transparent); margin: 48px 0; }
.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 Styles */
.faq-fuel-style .faq-item { background: #fff; border: 1px solid #E5E7EB; border-radius: 12px; margin-bottom: 12px; overflow: hidden; transition: all 0.2s ease; }
.faq-fuel-style .faq-item[open] { border-color: var(--accent-violet); box-shadow: 0 4px 20px rgba(124, 58, 237, 0.1); }
.faq-fuel-style summary.faq-question { padding: 16px 20px; cursor: pointer; font-weight: 600; color: var(--text-primary); list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-fuel-style .faq-item[open] summary.faq-question { color: var(--accent-violet); background: var(--accent-violet-light); }
.faq-question::after { content: '+'; font-size: 20px; color: var(--text-secondary); font-weight: 400; line-height: 1; }
.faq-fuel-style .faq-item[open] summary.faq-question::after { content: '−'; color: var(--accent-violet); }
.faq-answer { padding: 20px; color: var(--text-secondary); line-height: 1.6; font-size: 15px; }

/* --- МОБИЛЬНЫЕ СТИЛИ ДЛЯ НИЗА --- */
@media (max-width: 900px) {
    .formulas-grid { grid-template-columns: 1fr; gap: 16px; margin-bottom: 32px; }
    
    .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; }
    
    .formula-card { padding: 24px; text-align: center; align-items: center; }
    .formula-header { align-items: center; width: 100%; }
    
    .math-expression { width: 100%; max-width: 300px; margin-left: auto; margin-right: auto; }
    .info-wrapper { margin-top: 40px; padding-top: 40px; }
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }