/* ================================================= */
/* DRAINAGE.CSS - FINAL REFINED UI (FIXED ALIGNMENT) */
/* ================================================= */

@import url('https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@700&family=Poppins:wght@400;600;700;800&display=swap');

:root {
    --page-bg: #eaeff2;
    --text-main: #2c3e50;
    --text-muted: #5d6d7e;
    --rain-primary: #0088ff;
    --waste-primary: #8e44ad;
    --grad-ring-10: linear-gradient(135deg, #e3f2fd, #bbdefb);
    --grad-ring-15: linear-gradient(135deg, #e8f5e9, #c8e6c9);
    --grad-ring-20: linear-gradient(135deg, #f3e5f5, #e1bee7);
    --grad-tunnel:  linear-gradient(135deg, #fff3e0, #ffe0b2);
    --color-ring-10: #1976d2; --color-ring-15: #2e7d32;
    --color-ring-20: #7b1fa2; --color-tunnel:  #e65100;
    --font-main: 'Poppins', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
    --transition: 0.25s ease-in-out;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body { 
    background: var(--page-bg); 
    color: var(--text-main); 
    font-family: var(--font-main); 
    padding-top: 110px; /* Отступ под фиксированный хедер */
}

.container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 15px; }

/* 2. ИСПРАВЛЕННАЯ ШАПКА САЙТА */
.site-header { 
    position: fixed; 
    top: 0; 
    left: 0; 
    right: 0; 
    width: 100%; 
    z-index: 1000; 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    padding: 0 40px; 
    background: #2c3e50 !important; 
    height: 75px; 
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}

.site-header .logo img { max-width: 115px; display: block; }

.site-header .main-nav { 
    display: flex; 
    align-items: center; 
    gap: 30px; /* Отступ между иконками */
}

.site-header .main-nav img { 
    width: 28px; 
    height: auto; 
    filter: brightness(0) invert(1); /* Делает иконки белыми */
    transition: transform 0.2s;
}

.site-header .main-nav a:hover img { transform: scale(1.1); }

/* 3. ЗАГОЛОВОК И ТАБЫ */
h1 { 
    text-align: center; 
    font-family: var(--font-main);
    font-weight: 800; 
    font-size: 2.2rem; 
    text-transform: uppercase; 
    margin-bottom: 10px; 
    width: 100%;
    color: var(--text-main);
}

.intro { 
    text-align: center; 
    color: var(--text-muted); 
    margin-bottom: 40px; 
    font-size: 1.1rem; 
    font-weight: 400;
}

.custom-tabs { 
    display: flex; 
    background: #fff; 
    padding: 6px; 
    border-radius: 16px; 
    max-width: 550px; /* Увеличили ширину */
    margin: 0 auto 40px; 
    border: 1px solid #dbe2e8; 
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.tab-btn { 
    flex: 1; 
    padding: 15px 20px; /* Больше кликабельная зона */
    border: none; 
    border-radius: 12px; 
    font-weight: 700; 
    font-size: 1.05rem; /* Крупнее шрифт */
    cursor: pointer; 
    background: transparent; 
    color: var(--text-muted); 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    gap: 10px; 
    transition: var(--transition); 
}

.tab-btn i { font-size: 1.2rem; }
.tab-btn.active-rain { background: var(--rain-primary); color: #fff; box-shadow: 0 5px 15px rgba(0, 136, 255, 0.3); }
.tab-btn.active-waste { background: var(--waste-primary); color: #fff; box-shadow: 0 5px 15px rgba(142, 68, 173, 0.3); }

.tab-content-block { display: none; }
.tab-content-block.active { display: block; animation: fadeIn 0.3s ease-in; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* 4. КОНТРАСТНЫЕ ИНПУТЫ */
.info-block { background: #fff; border-radius: 26px; padding: 35px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); margin-bottom: 30px; }
.info-block h3 { font-size: 1.4rem; font-weight: 800; margin-bottom: 25px; display: flex; align-items: center; gap: 12px; }

.cards-grid {
    display: grid;
    /* Уменьшаем min-width с 260px до 200px, чтобы 3 карточки влезали даже на планшеты */
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); 
    gap: 20px;
    align-items: stretch; /* Растягивает все карточки в ряду до одинаковой высоты */
}

.input-card { 
    background: #f1f4f8 !important; 
    border: 2px solid #e2e8f0; 
    border-radius: 20px; 
    padding: 25px; 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    transition: var(--transition);
    height: 100%; /* Занимает всю высоту ячейки сетки */
    min-height: 220px; /* Фиксированная минимальная высота для выравнивания */
}

.input-card:hover { border-color: #cbd5e0; transform: translateY(-3px); background: #ebf0f6 !important; }


.card-icon { font-size: 2.8rem; margin-bottom: 15px; opacity: 0.9; }
#rainwater-calculator .card-icon { color: var(--rain-primary); }
#wastewater-calculator .card-icon { color: var(--waste-primary); }

.input-card label { 
    font-weight: 700; 
    font-size: 1.05rem; 
    margin-bottom: 10px; 
    text-align: center;
    min-height: 3em; /* Резервируем место под две строки текста, чтобы заголовки были вровень */
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.label-sub { display: block; font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }

.modern-select { 
    width: 100%; 
    padding: 12px 18px; 
    border: 2px solid #cbd5e0; 
    border-radius: 12px; 
    background: #fff; 
    font-weight: 700; 
    font-family: var(--font-main);
    color: var(--text-main); 
    cursor: pointer; 
    outline: none; 
    appearance: none; 
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%232c3e50' stroke-width='3'%3E%3Cpath d='M6 9l6 6 6-6'%3E%3C/path%3E%3C/svg%3E"); 
    background-repeat: no-repeat; 
    background-position: right 15px center; 
    margin-top: auto; /* Всегда прижимает выпадающий список к самому низу карточки */
}

/* 5. РЕЗУЛЬТАТЫ */
.result-block { background: #fff; border-radius: 26px; padding: 40px 30px; box-shadow: 0 15px 50px rgba(0,0,0,0.08); margin-top: 40px; text-align: center; }
.result-summary { display: flex; justify-content: center; gap: 20px; margin-bottom: 35px; flex-wrap: wrap; }
.summary-item { background: #f8fafc; padding: 18px 30px; border-radius: 18px; border: 1px solid #edf2f7; min-width: 220px; }
.summary-label { font-size: 0.95rem; font-weight: 600; color: var(--text-muted); display: block; margin-bottom: 5px; }
.result-number-main { font-family: var(--font-mono); font-size: 2.2rem; font-weight: 800; color: var(--text-main); }

/* СЕТКА РЕЗУЛЬТАТОВ (4 В РЯД) */
.drainage-options-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }

.drainage-option-card { padding: 30px 15px; border-radius: 22px; text-align: center; border: 1.5px solid rgba(255,255,255,0.6); transition: var(--transition); position: relative; overflow: hidden; }
.drainage-option-card:hover { transform: translateY(-5px); box-shadow: 0 12px 30px rgba(0,0,0,0.12); }

.card-ring-10 { background: var(--grad-ring-10); } .card-ring-15 { background: var(--grad-ring-15); }
.card-ring-20 { background: var(--grad-ring-20); } .card-tunnel { background: var(--grad-tunnel); }

.card-ring-10 .result-number-card, .card-ring-10 h5 { color: var(--color-ring-10); }
.card-ring-15 .result-number-card, .card-ring-15 h5 { color: var(--color-ring-15); }
.card-ring-20 .result-number-card, .card-ring-20 h5 { color: var(--color-ring-20); }
.card-tunnel .result-number-card, .card-tunnel h5 { color: var(--color-tunnel); }

.option-icon { height: 60px; display: flex; align-items: center; justify-content: center; margin-bottom: 15px; }
.option-icon i { font-size: 3rem; filter: drop-shadow(0 2px 5px rgba(0,0,0,0.1)); }

.drainage-option-card h5 { font-size: 1rem; font-weight: 800; text-transform: uppercase; margin-bottom: 8px; }
.result-number-card { font-family: var(--font-mono); font-size: 2.8rem; font-weight: 800; display: block; line-height: 1; }
.unit-text { font-size: 1.2rem; font-weight: 700; margin-left: 4px; }

/* 6. КНОПКИ */
.calculator-actions { display: flex; justify-content: center; gap: 20px; margin-top: 35px; }
.btn { padding: 18px 45px; font-size: 1.1rem; font-weight: 800; border-radius: 50px; border: none; cursor: pointer; color: #fff; text-transform: uppercase; letter-spacing: 1px; transition: var(--transition); }
.btn-calc-rain { background: linear-gradient(135deg, #007cf0, #00dfd8); box-shadow: 0 8px 20px rgba(0, 124, 240, 0.3); }
.btn-calc-waste { background: linear-gradient(135deg, #8e44ad, #d35400); box-shadow: 0 8px 20px rgba(142, 68, 173, 0.3); }
.btn-reset { background: #fff; color: #e74c3c; border: 2.5px solid #e74c3c; box-shadow: none; }
.btn:hover { transform: translateY(-3px); box-shadow: 0 12px 25px rgba(0,0,0,0.15); }

/* 7. АДАПТИВНОСТЬ */
@media (max-width: 900px) {
    .drainage-options-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
    body { padding-top: 85px; }
    h1 { font-size: 1.4rem; }
    .site-header { height: 65px; padding: 0 20px; }
    .site-header .logo img { max-width: 95px; }
    .site-header .main-nav { gap: 15px; }
    
    .input-card { flex-direction: row; justify-content: space-between; padding: 15px; min-height: 80px; }
    .card-icon { font-size: 2rem; margin: 0 15px 0 0; width: 40px; }
    .input-card label { text-align: left; font-size: 0.95rem; flex-grow: 1; }
    .modern-select { width: auto; min-width: 120px; font-size: 0.9rem; }

    /* МОБИЛЬНЫЕ ПОЛОСКИ РЕЗУЛЬТАТОВ */
    .drainage-options-grid { grid-template-columns: 1fr; gap: 8px; }
    .drainage-option-card { display: flex; align-items: center; justify-content: space-between; padding: 12px 20px; text-align: left; }
    .option-icon { height: auto; margin-bottom: 0; width: 40px; }
    .option-icon i { font-size: 1.8rem; }
    .drainage-option-card h5 { font-size: 0.85rem; margin: 0 10px; flex-grow: 1; }
    .result-number-card { font-size: 1.8rem; margin: 0; }
    
    .calculator-actions { flex-direction: column; width: 100%; gap: 12px; }
    .btn { width: 100%; padding: 15px; }
}

/* Galaxy Fold / Very narrow */
@media (max-width: 330px) {
    h1 { font-size: 1.2rem; }
    .tab-btn { font-size: 0.8rem; padding: 10px 5px; }
    .modern-select { min-width: 100px; }
    .result-number-card { font-size: 1.4rem; }
}