/* calc/assets/css/calculators/stretch-ceiling.css */

:root {
    --ceil-primary: #38BDF8; /* Неоновый голубой */
    --ceil-bg: #E0F2FE;      /* Светло-голубой для светлой части */
    --ceil-dark: #0F172A;    /* Глубокий черный (Slate 900) */
    --ceil-panel: #1E293B;   /* Темно-серый (Slate 800) */
    
    /* Неоновые цвета графика */
    --neon-canvas: #38BDF8;
    --neon-profile: #A78BFA;
    --neon-work: #F472B6;
}

/* --- ВЕРХНЯЯ ЧАСТЬ --- */
.calc-header { margin-bottom: 40px; }
.subtitle { color: var(--text-secondary); margin-top: 12px; font-size: 16px; line-height: 1.5; }

.calc-grid { display: grid; grid-template-columns: 1fr; gap: 32px; align-items: start; }
@media (min-width: 992px) { .calc-grid { grid-template-columns: 1.1fr 0.9fr; gap: 48px; } }

/* Инпуты */
.input-group { margin-bottom: 24px; }
.m-0 { margin-bottom: 0 !important; }
.mt-3 { margin-top: 16px !important; }

.label-with-icon { display: flex; align-items: center; gap: 8px; color: #0284C7 !important; font-size: 16px !important; font-weight: 700 !important; }

.input-wrapper { position: relative; display: flex; align-items: center; }
.input-wrapper input, .input-wrapper select {
    width: 100%; padding: 14px 16px; padding-right: 48px; /* Фикс для м2 */
    font-size: 16px; font-weight: 600; font-family: inherit;
    border: 1px solid #D1D5DB; border-radius: 12px;
    transition: all 0.2s; outline: none; background: #fff;
    color: #1F2937;
}
.input-wrapper input:focus, .input-wrapper select:focus { border-color: #0284C7; box-shadow: 0 0 0 4px rgba(2, 132, 199, 0.15); }
.suffix { position: absolute; right: 16px; color: #9CA3AF; font-weight: 600; pointer-events: none; font-size: 14px; top: 50%; transform: translateY(-50%); }

/* ИСПРАВЛЕНИЕ: Сетка колонок */
.row-2-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.highlight-group { background: var(--ceil-bg); padding: 20px; border-radius: 16px; border: 1px dashed #0284C7; }
.helper-text { font-size: 12px; color: #6B7280; margin-top: 8px; line-height: 1.4; }

.group-title-small { font-size: 14px; font-weight: 700; color: #0284C7; text-transform: uppercase; letter-spacing: 0.5px; margin: 0 0 16px 0; border-left: 3px solid #0284C7; padding-left: 8px; }
.form-divider { border: none; height: 1px; background: #BAE6FD; margin: 24px 0; opacity: 0.7; }

/* Вертикальные карточки радио */
.group-label { display: block; font-size: 14px; font-weight: 700; margin-bottom: 12px; color: #1F2937; opacity: 0.9; }
.radio-cards-vertical { display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
.radio-card-v { position: relative; cursor: pointer; display: block; }
.radio-card-v input { position: absolute; opacity: 0; height: 0; width: 0; }
.rc-content {
    border: 2px solid #F3F4F6; border-radius: 14px; padding: 14px 18px;
    transition: all 0.2s; background: #fff; display: block;
}
.radio-card-v:hover .rc-content { border-color: #E5E7EB; }
.radio-card-v input:checked + .rc-content { border-color: #0284C7; background: var(--ceil-bg); box-shadow: 0 4px 12px rgba(2, 132, 199, 0.08); }
.rc-title { font-weight: 700; color: #1F2937; font-size: 16px; margin-bottom: 4px; }
.rc-desc { font-size: 13px; color: #6B7280; line-height: 1.4; }


/* --- ПРАВАЯ ЧАСТЬ: РЕЗУЛЬТАТ (KILLER FEATURE: Dark Neon) --- */
@media (min-width: 992px) { .sticky-card { position: sticky; top: 24px; transition: top 0.3s; } }

.ceiling-result-card {
    background: var(--ceil-dark); /* Темный фон */
    border: 2px solid var(--ceil-panel); 
    padding: 32px;
    border-radius: 20px;
    box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.5);
    color: #F8FAFC; /* Светлый текст */
    overflow: hidden;
    position: relative;
}

/* Эффект глянцевого отблеска на потолке */
.ceiling-result-card::before {
    content: ''; position: absolute; top: -50px; left: -50px; width: 150px; height: 150px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%; pointer-events: none;
}

.result-header-neon { text-align: center; margin-bottom: 32px; position: relative; z-index: 2; }
.result-header-neon h2 { font-size: 14px; font-weight: 800; color: #94A3B8; margin: 0 0 8px 0; text-transform: uppercase; letter-spacing: 1px; }
.neon-profit { margin-bottom: 8px; }
.neon-profit span { 
    font-size: 46px; font-weight: 800; color: var(--ceil-primary); line-height: 1; letter-spacing: -1px; 
    text-shadow: 0 0 20px rgba(56, 189, 248, 0.5); /* Неоновое свечение */
}
.neon-subtitle { font-size: 14px; color: #64748B; font-weight: 600; text-transform: uppercase; letter-spacing: 2px;}

/* KILLER FEATURE: Неоновая диаграмма */
.neon-chart-wrapper { display: flex; align-items: center; gap: 24px; margin-bottom: 32px; justify-content: center; background: var(--ceil-panel); padding: 20px; border-radius: 16px; border: 1px solid #334155; }
.n-chart {
    width: 110px; height: 110px; border-radius: 50%;
    background: conic-gradient(
        var(--neon-canvas) 0% 33%, 
        var(--neon-profile) 33% 66%, 
        var(--neon-work) 66% 100%
    );
    position: relative; flex-shrink: 0;
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.3); /* Свечение от графика */
    transition: background 0.5s ease;
}
.n-center {
    position: absolute; top: 12px; left: 12px; right: 12px; bottom: 12px;
    background: var(--ceil-panel); border-radius: 50%; 
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.5);
}

.n-legend { display: flex; flex-direction: column; gap: 10px; font-size: 13px; font-weight: 600; color: #E2E8F0; }
.n-legend-item { display: flex; align-items: center; gap: 8px; }
.n-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; box-shadow: 0 0 8px currentColor; }
.dot-canvas { background: var(--neon-canvas); color: var(--neon-canvas); }
.dot-profile { background: var(--neon-profile); color: var(--neon-profile); }
.dot-work { background: var(--neon-work); color: var(--neon-work); }

/* Итоги (Темная тема) */
.neon-divider { height: 1px; background: #334155; margin: 24px 0; position: relative; z-index: 2; }

.neon-details { display: flex; flex-direction: column; gap: 14px; position: relative; z-index: 2; }
.nd-row { display: flex; justify-content: space-between; align-items: center; font-size: 14px; color: #94A3B8; padding-bottom: 12px; border-bottom: 1px dashed #334155; }
.nd-row:last-child { border-bottom: none; padding-bottom: 0; }
.nd-val { font-size: 16px; font-weight: 700; color: #F8FAFC; }


/* --- НИЖНЯЯ ЧАСТЬ (SEO, INFO) --- */
.info-wrapper { padding: 80px 0; margin-top: 60px; border-top: 1px solid #E5E7EB; }

.author-badge { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 40px; padding: 20px; background: #F8FAFC; border-radius: 16px; border: 1px solid #E2E8F0; }
.author-avatar { width: 48px; height: 48px; background: #1F2937; color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.author-info { display: flex; flex-direction: column; min-width: 0; }
.author-name { font-size: 15px; font-weight: 700; color: #111827; line-height: 1.4; margin-bottom: 4px; }
.author-date { font-size: 13px; color: #6B7280; }

.icon-heading { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 32px; font-size: 26px; font-weight: 800; color: #111827; line-height: 1.25; letter-spacing: -0.02em; }
.header-icon { display: flex; align-items: center; justify-content: center; width: 52px; height: 52px; border-radius: 14px; background: #fff; box-shadow: 0 4px 12px rgba(0,0,0,0.06); flex-shrink: 0; margin-top: -6px; font-size: 26px; }

.blue-icon { color: #0284C7; }
.dark-icon { color: #1F2937; }
.text-danger { color: #EF4444; font-weight: 700;}
.text-success { color: #10B981; font-weight: 700;}
.text-warning { color: #F59E0B; font-weight: 700;}

.formulas-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-bottom: 56px; }
.formula-card { background: #fff; border: 1px solid rgba(0,0,0,0.04); box-shadow: 0 4px 20px rgba(0,0,0,0.03); border-radius: 24px; padding: 32px; transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); display: flex; flex-direction: column; }
.formula-card:hover { transform: translateY(-6px); box-shadow: 0 12px 32px rgba(2, 132, 199, 0.1); border-color: rgba(2, 132, 199, 0.1); }
.formula-header { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; margin-bottom: 20px; }
.formula-card h3 { margin: 0; font-size: 20px; font-weight: 700; color: var(--text-primary); line-height: 1.3; }

.badge-blue { background: #0284C7; color: #fff; padding: 6px 12px; border-radius: 99px; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; display: inline-block; }
.badge-dark { background: #1F2937; color: #fff; padding: 6px 12px; border-radius: 99px; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; display: inline-block; }

.formula-card p { font-size: 15px; color: var(--text-secondary); margin: 0; line-height: 1.6; font-weight: 500; }
.math-expression { background: var(--ceil-bg); border: 1px dashed #0284C7; padding: 18px; border-radius: 14px; font-weight: 700; color: #0284C7; text-align: center; margin-bottom: 20px; font-size: 17px; font-family: 'Courier New', Courier, monospace; letter-spacing: 0.5px; }

.soft-divider { border: none; height: 1px; background: linear-gradient(90deg, transparent, #E5E7EB, transparent); margin: 56px 0; opacity: 0.7; }
.intro-text { font-size: 16px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 40px; }
.calc-description p { font-size: 17px; line-height: 1.7; color: #4B5563; margin-bottom: 24px; }
.calc-description strong { color: #1F2937; font-weight: 700; }

/* Перелинковка */
.internal-links-box { margin-top: 32px; background: #F3F4F6; padding: 24px; border-radius: 16px; border-left: 4px solid #0284C7; }
.internal-links-box h4 { margin: 0 0 12px 0; font-size: 17px; color: #111827; }
.internal-links-box ul { margin: 0; padding-left: 20px; color: #4B5563; }
.internal-links-box li { margin-bottom: 8px; font-size: 15px; }
.internal-links-box a { color: #0284C7; text-decoration: underline; font-weight: 600; }

/* SEO Таблица */
.seo-table-wrapper { overflow-x: auto; margin-bottom: 48px; background: #fff; border-radius: 16px; border: 1px solid #E5E7EB; box-shadow: 0 4px 10px rgba(0,0,0,0.02); }
.seo-table-wrapper::-webkit-scrollbar { height: 6px; }
.seo-table-wrapper::-webkit-scrollbar-thumb { background: #D1D5DB; border-radius: 3px; }
.seo-table { width: 100%; border-collapse: collapse; min-width: 500px; text-align: left; }
.seo-table th { background: #F9FAFB; padding: 18px 24px; font-size: 13px; font-weight: 800; color: #6B7280; text-transform: uppercase; border-bottom: 1px solid #E5E7EB; letter-spacing: 0.5px; }
.seo-table td { padding: 18px 24px; font-size: 15px; border-bottom: 1px solid #F3F4F6; color: #374151; vertical-align: top; line-height: 1.5; }
.seo-table tr:last-child td { border-bottom: none; }

.howto-section { margin-top: 48px; }
.howto-step { display: flex; gap: 20px; margin-bottom: 32px; background: #fff; padding: 24px; border-radius: 20px; border: 1px solid #E5E7EB; transition: box-shadow 0.2s, transform 0.2s; }
.howto-step:hover { box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05); transform: translateY(-2px); }
.step-num { width: 36px; height: 36px; background: var(--ceil-bg); color: #0284C7; font-weight: 800; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 15px; border: 1px solid rgba(2, 132, 199, 0.2); }
.step-content h4 { margin: 0 0 10px 0; font-size: 18px; color: #111827; font-weight: 700; }
.step-content p { margin: 0; font-size: 16px; color: #6B7280; line-height: 1.6; }

.faq-section .faq-item { background: #fff; border: 1px solid #E5E7EB; border-radius: 16px; margin-bottom: 16px; overflow: hidden; transition: all 0.2s ease; }
.faq-section .faq-item:hover { border-color: #D1D5DB; }
.faq-section .faq-item[open] { border-color: #0284C7; box-shadow: 0 8px 20px rgba(2, 132, 199, 0.08); }
summary.faq-question { padding: 22px 28px; cursor: pointer; font-weight: 700; color: var(--text-primary); font-size: 17px; list-style: none; position: relative; display: flex; justify-content: space-between; align-items: center; transition: background 0.2s; }
.faq-section .faq-item[open] summary.faq-question { color: #0284C7; background: var(--ceil-bg); border-bottom: 1px solid #BAE6FD; }
.faq-question::after { content: '+'; font-size: 26px; color: #9CA3AF; font-weight: 400; line-height: 1; transition: transform 0.3s; }
.faq-section .faq-item[open] summary.faq-question::after { content: '−'; color: #0284C7; }
.faq-answer, .faq-item div[itemprop="text"] { padding: 28px; color: var(--text-secondary); line-height: 1.7; font-size: 16px; background: #fff; }
.faq-answer p { margin: 0; }

/* ИСПРАВЛЕНИЕ: Мобильная адаптация */
@media (max-width: 900px) {
    .calc-header { margin-bottom: 32px; }
    .formulas-grid { grid-template-columns: 1fr; gap: 20px; }
    .icon-heading { font-size: 22px; gap: 12px; }
    .header-icon { width: 44px; height: 44px; font-size: 22px; }
    .formula-card { padding: 24px; }
    summary.faq-question { padding: 18px 20px; font-size: 16px; }
    .faq-answer, .faq-item div[itemprop="text"] { padding: 20px; font-size: 15px; }
    .howto-step { padding: 20px; gap: 16px; flex-direction: column; }
    .step-num { margin-bottom: -8px; }
}

@media (max-width: 480px) {
    .author-badge { padding: 16px; gap: 12px; align-items: flex-start; flex-direction: row; }
    .author-avatar { width: 40px; height: 40px; font-size: 18px; }
    
    /* Перестраиваем сетку инпутов в колонку для мобильных, чтобы м2 не наезжало */
    .row-2-col { grid-template-columns: 1fr; gap: 16px; }
    .input-group.m-0 { margin-bottom: 0; }
    .mt-3 { margin-top: 0 !important; }
    
    .input-wrapper input { padding-right: 48px; }
    
    .neon-chart-wrapper { flex-direction: column; gap: 16px; padding: 16px; }
    .neon-profit span { font-size: 40px; }
    .ceiling-result-card { padding: 24px 16px; }
}