:root {
    --accent: #23b5c9;
    --accent-soft: #e3f7fa;
    --dark: #333333;
    --gray: #f5f5f7;
    --border: #dddddd;
    --radius: 8px;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05);
    --transition: 0.2s ease-in-out;
    --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-main);
    color: var(--dark);
    background-color: #ffffff;
    line-height: 1.5;
}

/* Layout */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

.section {
    padding: 72px 0;
}

.section-gray {
    background-color: var(--gray);
}

.section-accent {
    background-color: var(--accent-soft);
}

/* Header */

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    flex-shrink: 0;
    height: 240px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-main {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--dark);
}

.logo-sub {
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--dark);
    margin-top: 2px;
}

.nav a {
    margin-left: 20px;
    text-decoration: none;
    color: var(--dark);
    font-size: 14px;
    font-weight: 500;
}

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

.nav a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

.nav-phone {
    color: var(--accent) !important;
    font-weight: 600 !important;
    white-space: nowrap;
}

/* Hero */

.hero {
    padding: 96px 0 72px;
}

.hero-inner {
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 32px;
    margin-bottom: 16px;
}

.hero p {
    font-size: 18px;
    margin-bottom: 24px;
    color: #555555;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

/* Buttons */

.btn {
    display: inline-block;
    padding: 12px 22px;
    border-radius: 999px;
    border: none;
    background-color: var(--accent);
    color: #ffffff;
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition);
    box-shadow: var(--shadow-soft);
}

.btn:hover {
    background-color: #1a98a9;
    transform: translateY(-1px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn-secondary {
    background-color: #ffffff;
    color: var(--dark);
    border: 1px solid var(--border);
    box-shadow: none;
}

.btn-secondary:hover {
    background-color: var(--gray);
}

/* Typography */

h2 {
    font-size: 26px;
    margin-bottom: 16px;
}

h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.section-text {
    max-width: 760px;
    font-size: 16px;
    color: #555555;
}

/* Grids */

.grid {
    display: grid;
    gap: 20px;
}

.grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* Cards */

.benefit-card,
.card {
    background-color: #ffffff;
    border-radius: var(--radius);
    padding: 18px 18px 20px;
    box-shadow: var(--shadow-soft);
}

.benefit-card p,
.card p {
    font-size: 14px;
    color: #555555;
}

.benefit-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #7ee3f3);
    margin-bottom: 10px;
}

/* Table */

.table-wrapper {
    overflow-x: auto;
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    background-color: #ffffff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.spec-table th,
.spec-table td {
    padding: 12px 16px;
    font-size: 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.spec-table th {
    background-color: var(--gray);
    font-weight: 600;
}

/* Steps */

.steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.step {
    background-color: #ffffff;
    border-radius: var(--radius);
    padding: 18px 18px 20px;
    box-shadow: var(--shadow-soft);
    font-size: 14px;
    color: #555555;
}

.step-number {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background-color: var(--accent);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-bottom: 10px;
}

/* Contacts */

.contacts-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
    gap: 28px;
    align-items: flex-start;
}

.contacts-text p {
    color: #444444;
}

.contact-form {
    background-color: #ffffff;
    border-radius: var(--radius);
    padding: 20px 20px 24px;
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.contact-form label {
    display: flex;
    flex-direction: column;
    font-size: 13px;
    gap: 4px;
}

.contact-form input,
.contact-form textarea {
    border-radius: 6px;
    border: 1px solid var(--border);
    padding: 8px 10px;
    font-family: var(--font-main);
    font-size: 14px;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(35, 181, 201, 0.1);
}

.contact-form textarea {
    resize: vertical;
    min-height: 80px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

/* Footer */

.footer {
    padding: 24px 0 28px;
    background-color: #111111;
    color: #f1f1f1;
    font-size: 13px;
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px;
}

.footer a {
    color: #b5e9f1;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* Responsive */

@media (max-width: 992px) {
    .grid-4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .contacts-inner {
        grid-template-columns: 1fr;
    }
    
    .section-accent .btn {
        width: 100%;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .nav {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }

    .nav-phone {
        margin-left: 0 !important;
        font-size: 13px;
    }

    .hero-inner {
        flex-direction: column;
    }

    .hero {
        padding-top: 80px;
    }

    .grid-3,
    .grid-4,
    .steps {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
    
    .section-accent .btn {
        width: 100%;
        font-size: 16px !important;
        padding: 14px 24px !important;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 24px;
    }

    .hero p {
        font-size: 16px;
    }

    .logo-main {
        font-size: 18px;
    }
    
    .logo-icon {
        height: 192px;
        width: auto;
    }
}