/* переменные */
:root {
    --bg: #f7f9fb;
    --card: #ffffff;
    --primary: #0b74da;
    --muted: #6b7280;
    --accent: #f59e0b;
    --radius: 12px;
    --container: 1200px;
    --gap: 18px;
    font-family: Inter, Roboto, -apple-system, "Segoe UI", Arial, sans-serif;
}

* {
    box-sizing: border-box
}

body {
    margin: 0;
    background: var(--bg);
    color: #0f172a;
    line-height: 1.45
}

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

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 18px
}

/* название, логотип, навигация */
header {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
    backdrop-filter: blur(4px);
    position: sticky;
    top: 0;
    z-index: 40;
    border-bottom: 1px solid #e6eef8
}

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

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

.logo img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 8px
}

.site-title {
    font-weight: 700;
    font-size: 18px
}

.sign {
    font-size: 12px;
    color: var(--muted)
}


nav {
    display: flex;
    gap: 16px;
    align-items: center
}

nav a {
    padding: 8px 10px;
    border-radius: 8px;
    color: var(--muted);
    font-weight: 600
}

nav a:hover {
    background: rgba(11, 116, 218, 0.08);
    color: var(--primary)
}

/* бургер для мобильных */
.burger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer
}

.burger span {
    width: 22px;
    height: 3px;
    background: #0f172a;
    border-radius: 2px
}
 /* мобильное меню */
 .mobile-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 72px;
    background: var(--card);
    padding: 12px;
    border-bottom: 1px solid #eef6ff
 }
 .mobile-nav a {
    display: block;
    padding: 8px 6px
 }
 .mobile-nav.show {
    display: block
 }
/* слайдер */
.hero {
    padding: 20px 0
}

.slider {
    position: relative;
    overflow: hidden;
    border-radius: 14px;
    background: linear-gradient(90deg, #ffffff, #fbfdff);
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06)
}

.slides {
    display: flex;
    transition: transform 400ms ease
}

.slide {
    min-width: 100%;
    display: flex;
    align-items: center;
    gap: 28px;
    padding: 26px
}

.slide img {
    width: 48%;
    max-height: 360px;
    object-fit: contain;
    border-radius: 10px
}

.slide .info {
    width: 48%
}

.slide h2 {
    margin: 0 0 8px;
    font-size: 26px
}

.slide p {
    margin: 0 0 16px;
    color: var(--muted)
}

.slider .controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 6px
}

.btn {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid #e6eef8;
    padding: 10px;
    border-radius: 10px;
    cursor: pointer
}

/* точки */
.dots {
    display: flex;
    gap: 8px;
    justify-content: center;
    padding: 12px
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #dbe9ff;
    cursor: pointer
}

.dot.active {
    background: var(--primary)
}

.text {
    color:var(--muted);
    max-width:820px
}
/* карточки преимущества */
.features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin: 20px 0
}

.card {
    background: var(--card);
    padding: 16px;
    border-radius: 12px;
    box-shadow: 0 4px 14px rgba(11, 74, 133, 0.04);
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-start
}

.card h3 {
    margin: 0;
    font-size: 16px
}

.card p {
    margin: 0;
    color: var(--muted);
    font-size: 14px
}
 /* подвал */
 footer {
     padding: 24px 0;
     border-top: 1px dashed #e6eef8;
     margin-top: 28px
 }
 .footer-inner {
     display: flex;
     justify-content: space-between;
     align-items: center
 }

 /* адаптивность */
 @media (max-width:900px) {
    .slide img {
        display: none
    }
   .slide .info {
        width: 100%
   }
   .features {
        grid-template-columns: repeat(2, 1fr)
   }
   nav {
        display: none
   }
   .burger {
        display: flex
   }
 }
 @media (max-width:520px) {
    .features {
        grid-template-columns: 1fr
    }
   .header-inner {
        padding: 10px 0
   }
   .slide h2 {
        font-size: 20px
   }
 }

 /* анимация появления */
 .fade-in {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 500ms ease, transform 500ms ease
 }
 .fade-in.visible {
    opacity: 1;
    transform: none
 }