/* calc/assets/css/calculators/logarithm.css */

:root {
    --bg-light-glass: #FFFFFF;
    --text-light-main: #1E293B; /* Slate 800 */
    --text-light-muted: #64748B; /* Slate 500 */
    --accent-light-blue: #3B82F6;
    --accent-light-rose: #F43F5E;
    --glass-border: #E2E8F0;
    --glass-shadow: 0 25px 50px -12px rgba(148, 163, 184, 0.25);
    
    --text-gradient: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 50%, #F43F5E 100%);
}

/* =========================================
   ОСНОВНАЯ СЕТКА И КАРКАС
   ========================================= */
.calc-header { margin-bottom: 32px; }
.subtitle { color: var(--text-secondary); margin-top: 8px; }

.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; } }

.calc-inputs { gap: 16px; }
.group-title { font-size: 15px; font-weight: 800; color: #334155; margin: 0 0 16px 0; text-transform: uppercase; letter-spacing: 0.05em;}

.input-group { margin-bottom: 16px; }
.input-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-primary); }

.input-wrapper { position: relative; display: flex; align-items: center; }
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type="number"] { -moz-appearance: textfield; }

.input-wrapper select,
.input-wrapper input {
    width: 100%; padding: 14px 16px; font-size: 16px; font-weight: 600;
    border: 1px solid #CBD5E1; border-radius: 12px;
    outline: none; transition: border 0.2s, box-shadow 0.2s, background 0.2s;
    font-family: inherit; background: #fff; appearance: none;
}
.input-wrapper select { cursor: pointer; }
.input-wrapper input:focus, .input-wrapper select:focus { 
    border-color: #3B82F6; box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15); 
}
.input-wrapper input:disabled { background: #F8FAFC; color: #94A3B8; cursor: not-allowed; }

.row-2-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.info-alert {
    display: flex; align-items: flex-start; gap: 12px;
    background: #EFF6FF; border: 1px solid #BAE6FD;
    padding: 16px; border-radius: 12px; margin-top: 16px;
    color: #0369A1; font-size: 13px; line-height: 1.5;
}
.info-alert svg { flex-shrink: 0; color: #0284C7; margin-top: -2px; }

/* =========================================
   ПРАВАЯ КАРТОЧКА (Light Glass Theme)
   ========================================= */
.card--light-glass { 
    background: var(--bg-light-glass); 
    background-image: linear-gradient(135deg, rgba(255,255,255,1) 0%, rgba(248,250,252,1) 100%);
    color: var(--text-light-main); 
    border: 1px solid var(--glass-border); border-radius: 20px;
    box-shadow: var(--glass-shadow);
    overflow: hidden; padding: 24px 0 0 0; 
}
@media (min-width: 900px) { .sticky-card { position: sticky; top: 24px; } }

.glass-title { 
    color: var(--text-light-muted); margin: 0 24px 20px; 
    font-size: 13px; text-align: center; 
    font-weight: 800; letter-spacing: 0.15em; text-transform: uppercase;
}

.glass-display { 
    padding: 24px; text-align: center; margin-bottom: 8px;
}
.glass-label { font-size: 12px; color: var(--text-light-muted); font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 12px; }

.glass-value-wrapper {
    display: flex; align-items: baseline; justify-content: center; gap: 12px; flex-wrap: wrap;
}

.math-expr { font-size: 24px; font-weight: 600; color: var(--text-light-main); }
.math-equals { font-size: 24px; font-weight: 400; color: var(--text-light-muted); }
.glass-value { 
    font-size: 48px; font-weight: 800; line-height: 1;
    background: var(--text-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text; color: transparent;
    word-break: break-all;
}

.error-msg {
    background: #FEF2F2; color: #E11D48;
    padding: 12px; border-radius: 12px; font-size: 14px; font-weight: 700;
    margin-top: 16px; border: 1px solid #FECDD3;
}
.hidden { display: none !important; }

.glass-breakdown-box { padding: 0 24px; text-align: center; margin-bottom: 24px; }
.check-box {
    background: #F8FAFC; border: 1px solid #E2E8F0;
    padding: 16px; border-radius: 12px; font-size: 18px; font-weight: 600;
    color: var(--text-light-main);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

.glass-divider { height: 1px; background: #E2E8F0; margin: 0 24px; }

.details-list { display: flex; flex-direction: column; background: transparent; margin: 0;}
.detail-row { display: flex; justify-content: space-between; align-items: center; padding: 16px 24px; font-size: 14px; border-bottom: 1px solid #F1F5F9; color: var(--text-light-muted);}
.detail-row:last-child { border-bottom: none; }
.detail-row strong { font-size: 16px; font-weight: 700; color: var(--text-light-main); }

/* =========================================
   SEO ИНФОБЛОКИ И ТАБЛИЦА
   ========================================= */
.info-wrapper { padding: 60px 0; margin-top: 60px; border-top: 1px solid rgba(0,0,0,0.06); margin-bottom: 20px; }
.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; }

.soft-blue-icon svg { color: #3B82F6; }
.slate-icon svg { color: #475569; }
.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: 0 4px 20px rgba(0,0,0,0.03); border-radius: 24px; 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; }

.badge-soft-blue { background: #E0E7FF; color: #3B82F6; padding: 6px 12px; border-radius: 99px; font-size: 11px; font-weight: 800; text-transform: uppercase; }
.badge-soft-rose { background: #FFE4E6; color: #E11D48; padding: 6px 12px; border-radius: 99px; font-size: 11px; font-weight: 800; text-transform: uppercase; }

.formula-card p { font-size: 14px; color: var(--text-secondary); margin: 0; line-height: 1.5; font-weight: 500; }
.math-expression { background: #F8FAFC; border: 1px solid #E2E8F0; padding: 12px 16px; border-radius: 12px; text-align: center; margin-bottom: 16px; overflow-x: auto; }

/* SEO-ТАБЛИЦА */
.seo-table-container { background: #fff; border: 1px solid #E5E7EB; border-radius: 16px; padding: 24px; margin-bottom: 40px; box-shadow: 0 4px 15px rgba(0,0,0,0.02); }
.seo-table-container h3 { margin-top: 0; margin-bottom: 20px; color: #1E293B; font-size: 18px; }
.seo-table { width: 100%; border-collapse: collapse; text-align: left; }
.seo-table th { background: #F8FAFC; padding: 12px 16px; font-weight: 700; color: #475569; border-bottom: 2px solid #E2E8F0; }
.seo-table td { padding: 16px; border-bottom: 1px solid #E2E8F0; color: #1E293B; font-weight: 500; }
.seo-table tr:last-child td { border-bottom: none; }

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

/* FAQ */
.faq-section .faq-item { background: #fff; border: 1px solid #E5E7EB; border-radius: 12px; margin-bottom: 12px; overflow: hidden; transition: all 0.2s ease; }
.faq-section .faq-item[open] { border-color: #3B82F6; box-shadow: 0 4px 20px rgba(59, 130, 246, 0.15); }
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; transition: background 0.2s; }
summary.faq-question:hover { background-color: #EFF6FF; }
.faq-section .faq-item[open] summary.faq-question { color: #2563EB; background: #EFF6FF; }

/* Защита текста вопроса от Flexbox-разрывов */
.faq-question-text { display: inline-block; max-width: 90%; }

.faq-question::after { content: '+'; font-size: 20px; color: var(--text-secondary); font-weight: 400; line-height: 1; }
.faq-question .icon-plus { display: none; }
.faq-section .faq-item[open] summary.faq-question::after { content: '−'; color: #2563EB; }
.faq-answer, .faq-item div[itemprop="text"] { padding: 20px; color: var(--text-secondary); line-height: 1.6; font-size: 15px; }

/* =========================================
   МОБИЛЬНАЯ АДАПТАЦИЯ (ИСПРАВЛЕНО)
   ========================================= */
@media (max-width: 900px) {
    .row-2-col { grid-template-columns: 1fr; }
    
    /* СЕТКА КАРТОЧЕК С ФОРМУЛАМИ ТЕПЕРЬ В ОДИН СТОЛБЕЦ */
    .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; }
    
    .seo-table-container { padding: 16px; overflow-x: auto; }
    .seo-table th, .seo-table td { padding: 12px 10px; font-size: 14px; }
    .glass-value { font-size: 36px; }
}