:root {
    --color-bg: #ffffff;
    --color-bg-light: #f9f9f9;
    --color-text: #111111;
    --color-text-muted: #666666;
    --color-primary: #000000;
    --color-border: #dddddd;
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-content {
    flex: 1;
}

/* Сетка: контент 70%, поля по 15% */
.container {
    width: 70%;
    margin: 0 15%;
}

/* Typography */
h1, h2, h3 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 0.8em;
    color: var(--color-text);
}

h1 { font-size: 3.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2.2rem; margin-bottom: 40px; }
h3 { font-size: 1.3rem; margin-bottom: 15px; }
p { margin-bottom: 1em; color: var(--color-text-muted); }

.subtitle {
    font-size: 1.25rem;
    max-width: 600px;
    margin-bottom: 30px;
}

/* Header */
.site-header {
    border-bottom: 1px solid var(--color-border);
    padding: 20px 0;
    background-color: var(--color-bg);
}

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

.logo-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.main-logo {
    height: 55px;
    width: auto;
    display: block;
}

.partner-status {
    display: block;
    font-size: 11px;
    color: var(--color-text-muted);
    margin-top: 5px;
    white-space: nowrap;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 40px;
}

.main-nav a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

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

/* Sections & Grid Layouts */
section {
    padding: 100px 0;
}

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

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

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

/* Cards & Service Items */
.service-card {
    padding: 40px;
    border: 1px solid var(--color-border);
    background: #fff;
    transition: border-color 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.service-card:hover {
    border-color: var(--color-primary);
}

/* Блок инсайта в калькуляторах */
.card-insight {
    margin: 20px 0;
    padding: 15px;
    background-color: var(--color-bg-light);
    border-left: 3px solid var(--color-primary);
    font-size: 0.9rem;
    color: var(--color-text);
}

.card-insight strong {
    display: block;
    margin-bottom: 5px;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

/* Founder Section */
.founder-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.founder-photo img {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    object-fit: cover;
}

.signature {
    margin-top: 20px;
    color: var(--color-text);
    font-weight: 600;
}

/* Forms */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 8px;
    font-weight: 500;
}

input[type="text"],
input[type="tel"],
input[type="number"] {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--color-border);
    background-color: var(--color-bg);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

input[type="text"]:focus,
input[type="tel"]:focus,
input[type="number"]:focus {
    border-color: var(--color-primary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 18px 36px;
    text-decoration: none;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    font-size: 0.95rem;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: #333333;
}

.service-card .btn {
    align-self: flex-start;
    margin-top: 20px;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 80px 0;
    background-color: var(--color-bg);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-contacts {
    text-align: right;
}

.footer-contacts a {
    color: inherit;
    text-decoration: none;
    display: block;
}

/* Responsive */
@media (max-width: 1200px) {
    .container { width: 90%; margin: 0 5%; }
}

@media (max-width: 992px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .founder-content { flex-direction: column; text-align: center; }
}

@media (max-width: 768px) {
    .container { padding: 0 20px; }
    h1 { font-size: 2.5rem; }
    .header-container { flex-direction: column; gap: 20px; }
    .footer-container { flex-direction: column; align-items: center; text-align: center; gap: 40px; }
    .footer-contacts { text-align: center; }
}