/* ===========================
   RESET & BASE
   =========================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f6f8fb;
    --color-dark: #0f172a;
    --color-text: #1e293b;
    --color-muted: #64748b;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-border: #e2e8f0;
    --radius: 12px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
    --shadow-md: 0 10px 30px rgba(15,23,42,.06);
    --shadow-lg: 0 20px 40px rgba(15,23,42,.1);
    --transition: .25s ease;
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* ===========================
   HEADER
   =========================== */
.header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,.9);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    min-height: 68px; gap: 24px;
}

.logo {
    font-weight: 800; font-size: 1.35rem; color: var(--color-dark);
    letter-spacing: -.02em;
}
.logo span { color: var(--color-accent); }
.logo:hover { color: var(--color-dark); }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a { color: var(--color-text); font-weight: 500; font-size: .95rem; }
.nav a:hover { color: var(--color-accent); }
.nav a.btn-primary { color: #fff; }

/* Burger (mobile) */
.burger { display: none; width: 40px; height: 40px; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.burger span { display: block; width: 24px; height: 2px; background: var(--color-dark); transition: var(--transition); }
.burger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===========================
   BUTTONS
   =========================== */
.btn-primary {
    display: inline-block;
    background: var(--color-accent);
    color: #fff !important;
    padding: 10px 22px;
    border-radius: 8px;
    font-weight: 600;
    font-size: .95rem;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 4px 14px rgba(37,99,235,.25);
}
.btn-primary:hover { background: var(--color-accent-hover); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(37,99,235,.35); color: #fff; }

.btn-large { padding: 14px 32px; font-size: 1rem; }

.btn-ghost {
    display: inline-block;
    padding: 13px 30px;
    border-radius: 8px;
    font-weight: 600;
    border: 1.5px solid var(--color-border);
    color: var(--color-text) !important;
    transition: border-color var(--transition), background var(--transition);
}
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent) !important; background: #f0f6ff; }

/* ===========================
   HERO
   =========================== */
.hero {
    padding: 100px 0 120px;
    background:
        radial-gradient(1200px 400px at 50% -10%, rgba(37,99,235,.08), transparent 60%),
        linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-tag {
    display: inline-block; padding: 6px 14px; border-radius: 999px;
    background: #eef2ff; color: var(--color-accent);
    font-size: .85rem; font-weight: 600; margin-bottom: 20px;
}

.hero h1 {
    font-size: clamp(2rem, 5.5vw, 3.75rem);
    line-height: 1.1; font-weight: 800; letter-spacing: -.03em;
    color: var(--color-dark); margin-bottom: 22px;
}

.hero h1 em { font-style: normal; color: var(--color-accent); }

.hero p {
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    color: var(--color-muted);
    max-width: 640px; margin: 0 auto 40px;
}

.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ===========================
   SECTIONS
   =========================== */
.section { padding: 100px 0; }
.section-alt { background: var(--color-bg-alt); }

.section-head { text-align: center; margin-bottom: 64px; }
.section-head h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800; letter-spacing: -.02em;
    color: var(--color-dark); margin-bottom: 16px;
}
.section-head p { color: var(--color-muted); max-width: 620px; margin: 0 auto; font-size: 1.05rem; }

/* ===========================
   CARDS GRID
   =========================== */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.card {
    display: flex; flex-direction: column;
    background: #fff; padding: 36px 32px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    text-decoration: none; color: inherit;
    position: relative;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; color: inherit; }

.card-icon {
    width: 52px; height: 52px; border-radius: 12px;
    background: #eef2ff; color: var(--color-accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; margin-bottom: 20px;
}

.card h3 { font-size: 1.35rem; font-weight: 700; margin-bottom: 12px; color: var(--color-dark); }
.card p { color: var(--color-muted); margin-bottom: 24px; flex: 1; }
.card .card-link { color: var(--color-accent); font-weight: 600; font-size: .95rem; }
.card .card-link::after { content: " →"; transition: var(--transition); display: inline-block; }
.card:hover .card-link::after { transform: translateX(4px); }


/* ===========================
   SERVICE BLOCK (каталог услуг)
   =========================== */
.service-block {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 48px 44px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}
.service-block:hover { box-shadow: var(--shadow-md); }

.service-header {
    display: flex; justify-content: space-between; align-items: flex-start;
    gap: 24px; flex-wrap: wrap; margin-bottom: 22px;
    padding-bottom: 24px; border-bottom: 1px solid var(--color-border);
}
.service-badge {
    display: inline-block;
    font-size: .75rem; font-weight: 700; letter-spacing: .05em;
    text-transform: uppercase; color: var(--color-accent);
    background: #eef2ff; padding: 4px 12px; border-radius: 999px;
    margin-bottom: 12px;
}
.service-header h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; letter-spacing: -.02em; color: var(--color-dark); }
.service-price { text-align: right; flex-shrink: 0; }
.price-from { display: block; font-size: 1.6rem; font-weight: 800; color: var(--color-dark); letter-spacing: -.02em; }
.price-term { display: block; font-size: .9rem; color: var(--color-muted); margin-top: 4px; }

.service-desc {
    font-size: 1.05rem; color: var(--color-muted);
    margin-bottom: 36px; max-width: 800px;
}

.service-cols {
    display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
    margin-bottom: 32px;
}
.service-cols h4 {
    font-size: .95rem; font-weight: 700; color: var(--color-dark);
    margin-bottom: 14px; text-transform: uppercase; letter-spacing: .05em;
}
.service-cols h4:not(:first-child) { margin-top: 28px; }

.check-list { display: flex; flex-direction: column; gap: 10px; }
.check-list li {
    position: relative; padding-left: 26px;
    font-size: .95rem; color: var(--color-text); line-height: 1.55;
}
.check-list li::before {
    content: ""; position: absolute; left: 0; top: 7px;
    width: 16px; height: 16px; border-radius: 50%;
    background: #dbeafe url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%232563eb'%3E%3Cpath d='M6.2 11.4 2.8 8l1-1 2.4 2.4 5.6-5.6 1 1z'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* Add-ons внутри блока услуги */
.service-addons {
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    padding: 26px 28px;
    margin-bottom: 28px;
}
.service-addons.wide { background: var(--color-bg-alt); padding: 32px 36px; }
.service-addons h4 {
    font-size: .95rem; font-weight: 700; color: var(--color-dark);
    margin-bottom: 16px; text-transform: uppercase; letter-spacing: .05em;
}
.addons-grid {
    display: grid; gap: 12px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.addon {
    display: inline-flex; align-items: center; gap: 8px;
    background: #fff; border: 1px solid var(--color-border);
    padding: 12px 16px; border-radius: 10px;
    font-size: .92rem; color: var(--color-text);
    transition: border-color var(--transition), transform var(--transition);
}
.addon:hover { border-color: var(--color-accent); transform: translateY(-2px); }

.service-cta { display: flex; justify-content: flex-end; }

/* Адаптив для service-блоков */
@media (max-width: 720px) {
    .service-block { padding: 32px 22px; }
    .service-cols { grid-template-columns: 1fr; gap: 28px; }
    .service-header { flex-direction: column; }
    .service-price { text-align: left; }
    .service-cta { justify-content: stretch; }
    .service-cta .btn-primary { width: 100%; text-align: center; }
}
/* ===========================
   FEATURES LIST
   =========================== */
.features { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.feature {
    display: flex; gap: 14px; align-items: flex-start;
    padding: 20px; border-radius: var(--radius);
    background: #fff; border: 1px solid var(--color-border);
}
.feature-icon { flex-shrink: 0; width: 36px; height: 36px; border-radius: 10px; background: #eef2ff; color: var(--color-accent); display: flex; align-items: center; justify-content: center; font-weight: 700; }
.feature h4 { font-size: 1rem; margin-bottom: 4px; color: var(--color-dark); }
.feature p { font-size: .9rem; color: var(--color-muted); }

/* ===========================
   PAGE HEADER (для внутренних страниц)
   =========================== */
.page-hero {
    padding: 80px 0 60px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}
.breadcrumbs { font-size: .9rem; color: var(--color-muted); margin-bottom: 16px; }
.breadcrumbs a { color: var(--color-muted); }
.breadcrumbs a:hover { color: var(--color-accent); }
.page-hero h1 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; letter-spacing: -.02em; color: var(--color-dark); margin-bottom: 16px; }
.page-hero p { color: var(--color-muted); max-width: 640px; margin: 0 auto; font-size: 1.1rem; }

/* ===========================
   PORTFOLIO
   =========================== */
.portfolio-grid { display: grid; gap: 28px; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.work {
    border-radius: var(--radius); overflow: hidden;
    background: #fff; border: 1px solid var(--color-border);
    transition: transform var(--transition), box-shadow var(--transition);
}
.work:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.work-thumb { aspect-ratio: 16/10; background: linear-gradient(135deg, #eef2ff, #dbeafe); display: flex; align-items: center; justify-content: center; color: var(--color-accent); font-size: 2.5rem; font-weight: 800; letter-spacing: -.05em; }
.work-body { padding: 24px 26px; }
.work-body h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--color-dark); }
.work-body p { font-size: .9rem; color: var(--color-muted); margin-bottom: 14px; }
.work-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-size: .75rem; padding: 4px 10px; border-radius: 999px; background: #f1f5f9; color: var(--color-muted); font-weight: 500; }

/* ===========================
   CTA
   =========================== */
.cta {
    padding: 90px 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: #fff; text-align: center;
}
.cta h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); font-weight: 800; letter-spacing: -.02em; margin-bottom: 16px; }
.cta p { color: #cbd5e1; max-width: 560px; margin: 0 auto 36px; font-size: 1.1rem; }

/* ===========================
   CONTACTS
   =========================== */
.contact-grid { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.contact-card {
    padding: 32px; border-radius: var(--radius);
    background: #fff; border: 1px solid var(--color-border); text-align: center;
}
.contact-card .card-icon { margin: 0 auto 18px; }
.contact-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.contact-card a { font-weight: 600; }
.contact-card p { color: var(--color-muted); font-size: .95rem; }

/* ===========================
   FOOTER
   =========================== */
.footer { padding: 70px 0 30px; background: #0f172a; color: #cbd5e1; }
.footer-grid { display: grid; gap: 40px; grid-template-columns: 2fr 1fr 1fr 1fr; margin-bottom: 50px; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 18px; font-weight: 700; }
.footer-col p { font-size: .92rem; color: #94a3b8; margin-top: 14px; max-width: 320px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: #cbd5e1; font-size: .92rem; }
.footer-col a:hover { color: #fff; }
.footer .logo { color: #fff; }
.footer .logo span { color: #60a5fa; }
.footer-bottom {
    padding-top: 26px; border-top: 1px solid #1e293b;
    display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
    font-size: .85rem; color: #64748b;
}
.footer-bottom a { color: #94a3b8; }

/* ===========================
   ANIMATIONS
   =========================== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 900px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
    .section { padding: 70px 0; }
    .hero { padding: 70px 0 90px; }

    /* Шапка */
    .header { z-index: 1000; }
    .header-inner { min-height: 60px; }

    /* Бургер */
    .burger {
        display: flex;
        z-index: 1001;
        position: relative;
    }
    .burger span { background: var(--color-dark); }

    /* Меню */
    .nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: auto;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
        flex-direction: column;
        align-items: stretch;
        background: #fff;
        padding: 16px 20px 24px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: 0 12px 24px rgba(15,23,42,.08);
        transform: translateY(-130%);
        transition: transform var(--transition);
        z-index: 999;
        gap: 4px;
    }
    .nav.open { transform: translateY(0); }

    .nav a {
        padding: 12px 10px;
        border-radius: 8px;
        font-size: 1rem;
    }
    .nav a:hover { background: #f1f5f9; }

    /* Кнопка «Обсудить проект» внутри меню — сбрасываем тень, чтобы не выпирала */
    .nav a.btn-primary {
        text-align: center;
        margin-top: 10px;
        box-shadow: none;
        padding: 14px 20px;
    }
    .nav a.btn-primary:hover { transform: none; box-shadow: none; }

    /* Футер */
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom { justify-content: center; text-align: center; }
}

.service-note {
    display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap;
    background: #eef2ff;
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius);
    padding: 22px 26px;
    margin-bottom: 28px;
}
.service-note p { color: var(--color-text); margin: 0; font-size: .98rem; flex: 1; min-width: 260px; }
.service-note strong { color: var(--color-dark); }

@media (max-width: 720px) {
    .service-note { flex-direction: column; align-items: flex-start; }
    .service-note .btn-ghost { width: 100%; text-align: center; }
}

.example-preview {
    display: flex; flex-direction: column; gap: 16px;
    margin-bottom: 32px;
}
.example-frame {
    border: 1px solid var(--color-border);
    border-radius: 12px; overflow: hidden;
    background: #fff; box-shadow: var(--shadow-md);
    transition: transform var(--transition), box-shadow var(--transition);
}
.example-frame:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }

.example-browser {
    display: flex; align-items: center; gap: 6px;
    padding: 10px 14px;
    background: #f1f5f9;
    border-bottom: 1px solid var(--color-border);
}
.example-browser span {
    width: 10px; height: 10px; border-radius: 50%;
    background: #cbd5e1; display: inline-block;
}
.example-browser span:nth-child(1) { background: #ff5f57; }
.example-browser span:nth-child(2) { background: #febc2e; }
.example-browser span:nth-child(3) { background: #28c840; }
.example-url {
    margin-left: 14px;
    font-size: .8rem; color: var(--color-muted);
    background: #fff; padding: 4px 12px; border-radius: 6px;
    flex: 1; max-width: 420px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.example-body { aspect-ratio: 16/10; position: relative; overflow: hidden; background: #eef2ff; }
.example-body img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }

.example-placeholder {
    position: absolute; inset: 0;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: var(--color-muted); gap: 6px; text-align: center; padding: 20px;
    background:
        repeating-linear-gradient(45deg, #eef2ff 0 10px, #e0e7ff 10px 20px);
}
.example-placeholder span { font-weight: 700; color: var(--color-accent); font-size: 1.1rem; }
.example-placeholder small { font-size: .85rem; }

/* ===========================
   DEMO BUTTON & CTA ROW
   =========================== */
.service-cta {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.btn-demo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
    color: #4338ca !important;
    border: 1.5px solid #c7d2fe;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.25s ease;
    box-shadow: 0 2px 4px rgba(67, 56, 202, 0.05);
}

.btn-demo:hover {
    background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
    border-color: #a5b4fc;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(67, 56, 202, 0.15);
    color: #3730a3 !important;
}

.btn-demo-icon {
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.btn-demo:hover .btn-demo-icon {
    transform: scale(1.15) rotate(-5deg);
}

@media (max-width: 720px) {
    .service-cta {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .btn-demo, .service-cta .btn-primary {
        width: 100%;
        justify-content: center;
        text-align: center;
    }
}