:root {
    --primary: #2c3e50;
    --secondary: #3a7bd5;
    --accent: #00d2ff;
    --dark: #2c2c2c;
    --light: #f4f7fa;
    --text: #333;
    --text-light: #555;
    --white: #fff;
    --shadow: 0 8px 25px rgba(0,0,0,0.08);
    --shadow-hover: 0 12px 28px rgba(0,0,0,0.14);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: url("../images/back.png") center center / cover fixed no-repeat;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: min(1200px, calc(100% - 40px));
    margin: 0 auto;
}

/* Header */
.main-header {
    background: var(--dark);
    color: var(--white);
    padding: 25px 0;
    text-align: center;
    box-shadow: var(--shadow);
    position: relative;
    z-index: 101;
}

.logo {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
    display: inline-block;
    margin-bottom: 8px;
    transition: var(--transition);
}

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

.tagline {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.8);
}

/* Main navigation */
.main-nav {
    background: var(--primary);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.12);
}

.main-nav ul {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 22px;
    list-style: none;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

.main-nav a {
    color: var(--white);
    text-decoration: none;
    font-size: 1.05rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 5px;
    transition: var(--transition);
    display: block;
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--accent);
    color: var(--dark);
}

/* Secondary navigation - унифицировано с ноутбуками */
.secondary-nav {
    background: rgba(44,62,80,0.94);
    padding: 9px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.secondary-nav ul {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    list-style: none;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

.secondary-nav a {
    color: rgba(255,255,255,0.88);
    text-decoration: none;
    font-size: 0.94rem;
    padding: 7px 13px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.secondary-nav a:hover,
.secondary-nav a.active {
    background: rgba(0,210,255,0.18);
    color: var(--accent);
}

.secondary-nav i {
    font-size: 0.95rem;
}

/* Hero */
.hero-section {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: 62px 0 58px;
    text-align: center;
}

.hero-section h1 {
    max-width: 900px;
    margin: 0 auto 14px;
    font-size: clamp(2rem, 4vw, 2.8rem);
    line-height: 1.15;
    animation: fadeInDown 0.8s ease;
}

.hero-text {
    max-width: 720px;
    margin: 0 auto 27px;
    font-size: clamp(1rem, 1.7vw, 1.18rem);
    color: rgba(255,255,255,0.9);
    animation: fadeIn 1s ease;
}

.cta-button {
    display: inline-block;
    padding: 13px 30px;
    border: 0;
    border-radius: 50px;
    background-color: var(--accent);
    color: var(--white);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,210,255,0.3);
    transition: var(--transition);
}

.cta-button:hover {
    background-color: #00b8e6;
    transform: translateY(-3px);
    box-shadow: 0 7px 20px rgba(0,210,255,0.4);
}

.contact-section {
    max-width: 900px;
    margin: 0 auto;
}

.contact-header {
    text-align: center;
    margin-bottom: 35px;
}

.contact-header .section-title {
    margin-bottom: 18px;
}

.contact-header p {
    max-width: 650px;
    margin: 15px auto 0;
    color: var(--text-light);
    font-size: 1.05rem;
}

.contact-form {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    border-radius: 12px;
    background-color: var(--white);
    box-shadow: var(--shadow-hover);
    text-align: left;
}

.form-group {
    margin-bottom: 22px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--primary);
    font-weight: 500;
    text-align: left;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 13px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background: var(--white);
    color: var(--text);
    font-family: inherit;
    font-size: 16px;
    transition: var(--transition);
    text-align: left;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0,210,255,0.16);
}

.contact-form .cta-button {
    border: 0;
}

.hp-field {
    position: absolute;
    height: 0;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
}

.hp-field label {
    display: none !important;
}

/* Content */
.main-content {
    flex: 1;
    padding: 55px 0 75px;
}

.section-title {
    text-align: center;
    color: var(--primary);
    font-size: clamp(1.7rem, 3vw, 2.1rem);
    margin-bottom: 34px;
    line-height: 1.2;
}

.section-title::after {
    content: '';
    display: block;
    width: 70px;
    height: 4px;
    margin: 13px auto 0;
    border-radius: 4px;
    background: linear-gradient(to right, var(--accent), var(--secondary));
}

/* Services */
.services-section {
    margin-bottom: 65px;
}

.service-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 22px;
    overflow: hidden;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.11);
}

.service-card-content {
    display: grid;
    grid-template-columns: 125px 1fr;
    align-items: stretch;
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 230px;
    background: linear-gradient(145deg, var(--primary), var(--secondary));
    color: var(--accent);
    font-size: 3.2rem;
}

.service-info {
    padding: 30px 34px;
}

.service-info h3 {
    color: var(--secondary);
    font-size: 1.45rem;
    margin-bottom: 9px;
}

.service-info p {
    color: var(--text-light);
    font-size: 1rem;
    margin-bottom: 16px;
}

.service-features {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px 25px;
    list-style: none;
}

.service-features li {
    position: relative;
    padding-left: 23px;
    color: var(--text);
}

.service-features li::before {
    content: '\f00c';
    position: absolute;
    left: 0;
    top: 1px;
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--accent);
}

/* Benefits */
.benefits-section {
    margin-bottom: 65px;
}

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

.benefit-card {
    min-height: 210px;
    padding: 27px 22px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 28px rgba(0,0,0,0.1);
}

.benefit-icon {
    display: block;
    color: var(--accent);
    font-size: 2.5rem;
    margin-bottom: 17px;
}

.benefit-card h3 {
    color: var(--primary);
    font-size: 1.1rem;
    margin-bottom: 9px;
}

.benefit-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Footer */
.main-footer {
    background: var(--dark);
    color: var(--white);
    padding: 55px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 45px;
    margin-bottom: 40px;
}

.footer-col h3 {
    position: relative;
    color: var(--white);
    font-size: 1.2rem;
    margin-bottom: 21px;
    padding-bottom: 10px;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 45px;
    height: 2px;
    background: var(--accent);
}

.contact-list,
.social-list,
.nav-list {
    list-style: none;
}

.contact-list li,
.social-list li,
.nav-list li {
    margin-bottom: 11px;
}

.contact-list a,
.social-list a,
.nav-list a {
    color: rgba(255,255,255,0.68);
    text-decoration: none;
    transition: var(--transition);
}

.contact-list a:hover,
.social-list a:hover,
.nav-list a:hover {
    color: var(--accent);
}

.contact-list i,
.social-list i {
    width: 20px;
    margin-right: 9px;
    text-align: center;
    color: var(--accent);
}

.footer-bottom {
    padding: 19px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    color: rgba(255,255,255,0.55);
    font-size: 14px;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Tablet */
@media (max-width: 1000px) {
    .benefits-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .service-card-content {
        grid-template-columns: 95px 1fr;
    }

    .service-icon {
        min-height: 250px;
        font-size: 2.7rem;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 700px) {
    .container {
        width: min(100% - 28px, 1200px);
    }

    .main-header {
        padding: 20px 0 18px;
    }

    .logo {
        font-size: 1.55rem;
    }

    .tagline {
        font-size: 0.9rem;
    }

    .main-nav {
        position: static;
    }

    .main-nav ul {
        gap: 6px;
    }

    .main-nav a {
        font-size: 0.95rem;
        padding: 7px 10px;
    }

    .secondary-nav ul {
        gap: 4px;
    }

    .secondary-nav a {
        font-size: 0.88rem;
        padding: 6px 8px;
    }

    .hero-section {
        padding: 45px 0 42px;
    }

    .hero-section h1 {
        font-size: 1.85rem;
    }

    .hero-text {
        font-size: 0.98rem;
        margin-bottom: 23px;
    }

    .main-content {
        padding: 42px 0 55px;
    }

    .section-title {
        margin-bottom: 27px;
    }

    .service-card-content {
        display: block;
    }

    .service-icon {
        min-height: 90px;
        font-size: 2.2rem;
    }

    .service-info {
        padding: 23px 21px 25px;
    }

    .service-info h3 {
        font-size: 1.3rem;
    }

    .service-features {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .benefit-card {
        min-height: auto;
        padding: 23px 20px;
    }

    .contact-header {
        margin-bottom: 25px;
    }

    .contact-header .section-title {
        font-size: 1.7rem;
    }

    .contact-header p {
        font-size: 0.98rem;
    }

    .contact-form {
        padding: 25px 20px;
    }

    .form-group label {
        font-size: 0.95rem;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 15px;
        padding: 12px 14px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .main-footer {
        padding-top: 42px;
    }
}

/* Small phones */
@media (max-width: 430px) {
    .logo {
        font-size: 1.35rem;
    }

    .tagline {
        font-size: 0.82rem;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 4px;
    }

    .main-nav li {
        text-align: center;
    }

    .main-nav a {
        width: 100%;
        font-size: 0.86rem;
        padding: 8px 12px;
        text-align: center;
    }

    .secondary-nav ul {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }

    .secondary-nav li {
        width: 100%;
    }

    .secondary-nav a {
        justify-content: center;
        font-size: 0.82rem;
    }

    .hero-section h1 {
        font-size: 1.6rem;
    }

    .hero-text {
        font-size: 0.92rem;
    }
}