/* =========================================
   БАЗОВЫЕ НАСТРОЙКИ И ПЕРЕМЕННЫЕ
   ========================================= */
:root {
    --primary-color: #0056b3; /* Глубокий синий - Доверие */
    --accent-color: #ff6600;  /* Оранжевый - Акцент/Кнопки */
    --text-color: #333333;
    --light-text: #666666;
    --bg-light: #f4f7f9;
    --white: #ffffff;
    --border-radius: 8px;
    --max-width: 1200px;
}

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

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

h1, h2, h3, h4 {
    line-height: 1.2;
    margin-bottom: 20px;
    color: #1a1a1a;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; color: var(--primary-color); }
h3 { font-size: 1.5rem; }

p { margin-bottom: 15px; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* =========================================
   ШАПКА И НАВИГАЦИЯ
   ========================================= */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
}

.main-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.main-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    padding: 5px 0;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.main-nav a:hover {
    color: var(--primary-color);
}

/* Класс активной страницы */
.main-nav a.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--accent-color);
}

/* =========================================
   ОБЩИЕ КОМПОНЕНТЫ
   ========================================= */
.btn {
    display: inline-block;
    padding: 12px 25px;
    background-color: var(--accent-color);
    color: var(--white);
    border-radius: var(--border-radius);
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}

.btn:hover {
    background-color: #e65c00;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

.section {
    padding: 60px 0;
}

.bg-light {
    background-color: var(--bg-light);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.card {
    background: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border: 1px solid #eee;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

/* =========================================
   СТРАНИЦЫ: КЕЙСЫ И ЦЕНЫ
   ========================================= */
.price-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.price-table th, .price-table td {
    padding: 15px;
    border: 1px solid #ddd;
    text-align: left;
}

.price-table th {
    background: var(--primary-color);
    color: var(--white);
}

.case-card {
    border-left: 4px solid var(--accent-color);
}

.result-metric {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    display: block;
}

/* =========================================
   ФОРМЫ
   ========================================= */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

/* =========================================
   ПОДВАЛ
   ========================================= */
footer {
    background: #1a1a1a;
    color: #ccc;
    padding: 40px 0;
    margin-top: 60px;
}

footer a {
    color: #fff;
    text-decoration: underline;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

/* =========================================
   АДАПТИВНОСТЬ
   ========================================= */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        gap: 15px;
    }
    .main-nav ul {
        justify-content: center;
        gap: 10px;
    }
    h1 { font-size: 2rem; }
}