/**
 * Промышленный минимализм
 * Цвета: сталь, бетон, акцент — синий
 */

:root {
    --color-primary: #0066b3;
    --color-primary-dark: #004d8c;
    --color-primary-light: #e6f0fa;
    --color-gray-100: #f8f9fa;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;
    --color-success: #2b7a3e;
    --color-warning: #d97706;
    --color-danger: #c62828;
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
}

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

body {
    font-family: var(--font-sans);
    background: #f5f7fa;
    color: var(--color-gray-800);
    line-height: 1.5;
}

/* Контейнер */
.uhf-calculator {
    max-width: 1400px;
    margin: 0 auto;
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

/* Заголовок */
.uhf-calculator h1 {
    font-size: 1.5rem;
    font-weight: 600;
    padding: 1.25rem 1.5rem;
    margin: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-gray-200);
    color: var(--color-gray-900);
}

/* ===== ФОРМА ===== */
.form-section {
    background: #fff;
    border-bottom: 1px solid var(--color-gray-200);
    padding: 1.5rem;
}

.form-section:last-of-type {
    border-bottom: none;
}

.form-section h2 {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-gray-600);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-section h2 i {
    color: var(--color-primary);
    font-size: 1.1rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--color-gray-600);
    margin-bottom: 0.5rem;
}

.form-group label i {
    margin-right: 0.25rem;
    font-size: 0.7rem;
}

.form-group input,
.form-group select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    font-family: var(--font-sans);
    transition: all 0.15s ease;
    background: #fff;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0,102,179,0.1);
}

.form-group input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

.form-group:has(input[type="checkbox"]) {
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
}

.form-group:has(input[type="checkbox"]) label {
    margin-bottom: 0;
    text-transform: none;
}

/* Кнопка расчёта */
.form-actions {
    text-align: center;
    padding: 1.5rem;
    background: var(--color-gray-100);
    border-top: 1px solid var(--color-gray-200);
}

.btn-calc {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s ease;
}

.btn-calc:hover {
    background: var(--color-primary-dark);
}

/* ===== РЕЗУЛЬТАТЫ ===== */
.results {
    padding: 1.5rem;
    background: var(--color-gray-100);
    border-top: 1px solid var(--color-gray-200);
}

.results > h2 {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-gray-600);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 1rem;
}

.result-card {
    background: #fff;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-200);
    overflow: hidden;
    transition: box-shadow 0.15s ease;
}

.result-card:hover {
    box-shadow: var(--shadow-md);
}

.result-card h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-gray-600);
    padding: 0.75rem 1rem;
    margin: 0;
    background: var(--color-gray-100);
    border-bottom: 1px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.result-card h3 i {
    color: var(--color-primary);
    font-size: 0.9rem;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--color-gray-200);
    font-size: 0.8125rem;
}

.result-item:last-child {
    border-bottom: none;
}

.result-item span:first-child {
    color: var(--color-gray-600);
}

.result-item span:last-child {
    font-weight: 500;
    color: var(--color-gray-800);
}

.result-item strong span:last-child {
    font-weight: 600;
    color: var(--color-gray-900);
}

/* Статусы */
.success {
    color: var(--color-success) !important;
}

.error {
    color: var(--color-danger) !important;
}

.warning {
    color: var(--color-warning) !important;
}

.result-verdict {
    background: var(--color-gray-100);
    border-radius: var(--border-radius-sm);
    margin-top: 0.25rem;
}

/* Нормативные источники */
.norm-source {
    font-size: 0.625rem;
    font-family: var(--font-mono);
    color: var(--color-gray-500);
    margin-top: 0.25rem;
    padding-left: 0.5rem;
    border-left: 2px solid var(--color-gray-300);
}

/* Full-width карточка сметы */
.result-card.full-width {
    grid-column: 1 / -1;
}

/* Таблицы сметы */
.result-card table {
    width: 100%;
    font-size: 0.75rem;
    border-collapse: collapse;
}

.result-card th,
.result-card td {
    padding: 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.result-card th {
    background: var(--color-gray-100);
    font-weight: 500;
    color: var(--color-gray-600);
    text-transform: uppercase;
    font-size: 0.625rem;
    letter-spacing: 0.3px;
}

.result-card td:last-child,
.result-card th:last-child {
    text-align: right;
}

/* Кнопки документов */
.document-buttons {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.btn-doc {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius-sm);
    background: #fff;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    color: var(--color-gray-700);
}

.btn-doc:hover {
    background: var(--color-gray-100);
    border-color: var(--color-primary);
}

.btn-doc i {
    font-size: 0.9rem;
}

.btn-doc.btn-primary {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.btn-doc.btn-primary:hover {
    background: var(--color-primary-dark);
}

.btn-doc.btn-success {
    background: var(--color-success);
    border-color: var(--color-success);
    color: #fff;
}

/* ===== АДАПТИВ ===== */
@media (max-width: 768px) {
    .form-section {
        padding: 1rem;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .results {
        padding: 1rem;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .btn-calc {
        width: 100%;
        justify-content: center;
    }
}