/* ==========================================================================
   Бинарность — дизайн-система (светлый корпоративный стиль)
   ========================================================================== */

:root {
    /* Палитра */
    --color-bg: #ffffff;
    --color-bg-soft: #f5f7fb;
    --color-bg-muted: #eef2f9;
    --color-surface: #ffffff;
    --color-border: #e4e9f2;
    --color-text: #131b2e;
    --color-text-muted: #5b6678;
    --color-text-soft: #8a93a5;

    --color-primary: #2c5cff;
    --color-primary-dark: #1d40c4;
    --color-primary-soft: #eaf0ff;
    --color-accent: #00b3a4;

    --color-success-bg: #e7f7ee;
    --color-success-text: #1c7a47;
    --color-error-bg: #fdecec;
    --color-error-text: #c0392b;

    /* Типографика */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;

    /* Геометрия */
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 22px;
    --shadow-sm: 0 1px 2px rgba(19, 27, 46, .06), 0 1px 3px rgba(19, 27, 46, .04);
    --shadow: 0 8px 24px rgba(19, 27, 46, .08);
    --shadow-lg: 0 18px 50px rgba(19, 27, 46, .12);

    --container: 1180px;
    --gutter: 24px;
    --header-h: 72px;
}

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

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

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 17px;
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--color-primary); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--color-primary-dark); }

h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .5em; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }

/* Layout helpers ---------------------------------------------------------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }

.section { padding: clamp(48px, 8vw, 96px) 0; }
.section--soft { background: var(--color-bg-soft); }
.section--muted { background: var(--color-bg-muted); }

.section-head { max-width: 720px; margin: 0 auto clamp(32px, 5vw, 56px); text-align: center; }
.section-head--left { margin-left: 0; text-align: left; }
.section-head .eyebrow { margin-bottom: 12px; }
.section-head p { color: var(--color-text-muted); font-size: 1.1rem; margin: 0; }

.eyebrow {
    display: inline-block;
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--color-primary);
    background: var(--color-primary-soft);
    padding: 6px 14px;
    border-radius: 999px;
}

.lead { font-size: 1.2rem; color: var(--color-text-muted); }
.text-muted { color: var(--color-text-muted); }

/* Buttons ----------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font: inherit;
    font-weight: 600;
    font-size: 1rem;
    line-height: 1;
    padding: 14px 26px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .12s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--color-primary); color: #fff; box-shadow: 0 6px 18px rgba(44, 92, 255, .28); }
.btn--primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn--ghost { background: #fff; color: var(--color-text); border-color: var(--color-border); }
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--light { background: rgba(255,255,255,.16); color: #fff; border-color: rgba(255,255,255,.32); }
.btn--light:hover { background: rgba(255,255,255,.26); color: #fff; }
.btn--block { width: 100%; }
.btn--lg { padding: 16px 32px; font-size: 1.05rem; }

/* Header ------------------------------------------------------------------ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .9);
    backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; font-size: 1.25rem; color: var(--color-text); letter-spacing: -.02em; }
.brand:hover { color: var(--color-text); }
.brand__mark {
    width: 38px; height: 38px; border-radius: 11px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    display: grid; place-items: center;
    color: #fff; font-weight: 800; font-size: 1.15rem;
    box-shadow: 0 6px 16px rgba(44, 92, 255, .3);
}
.brand__name b { color: var(--color-primary); }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: .98rem;
    padding: 9px 14px;
    border-radius: var(--radius-sm);
}
.nav a:hover { color: var(--color-text); background: var(--color-bg-soft); }
.nav a.is-active { color: var(--color-primary); }

.header-actions { display: flex; align-items: center; gap: 14px; }
.header-phone { font-weight: 700; color: var(--color-text); white-space: nowrap; }
.header-phone:hover { color: var(--color-primary); }

.nav-toggle {
    display: none;
    width: 44px; height: 44px;
    border: 1px solid var(--color-border);
    background: #fff; border-radius: var(--radius-sm);
    cursor: pointer;
    align-items: center; justify-content: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
    content: ""; display: block; width: 20px; height: 2px; background: var(--color-text); position: relative; transition: .2s;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

/* Hero -------------------------------------------------------------------- */
.hero {
    position: relative;
    background:
        radial-gradient(1200px 500px at 80% -10%, rgba(44,92,255,.10), transparent 60%),
        radial-gradient(900px 500px at 0% 10%, rgba(0,179,164,.08), transparent 55%),
        var(--color-bg);
    overflow: hidden;
}
.hero__inner { padding: clamp(56px, 9vw, 110px) 0 clamp(48px, 7vw, 90px); display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.hero h1 { margin-bottom: 18px; }
.hero p { font-size: 1.22rem; color: var(--color-text-muted); max-width: 540px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero__stats { display: flex; gap: 36px; margin-top: 44px; flex-wrap: wrap; }
.hero__stat .num { font-size: 2rem; font-weight: 800; color: var(--color-text); letter-spacing: -.02em; }
.hero__stat .lbl { color: var(--color-text-soft); font-size: .95rem; }

.hero__art {
    position: relative;
    border-radius: var(--radius-lg);
    background: linear-gradient(155deg, #14224a, #2c5cff 130%);
    color: #fff;
    padding: 32px;
    box-shadow: var(--shadow-lg);
    min-height: 320px;
    overflow: hidden;
}
.hero__art::after {
    content: ""; position: absolute; inset: 0;
    background-image: radial-gradient(rgba(255,255,255,.14) 1px, transparent 1px);
    background-size: 22px 22px; opacity: .5;
}
.hero__code { position: relative; z-index: 1; font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; font-size: .92rem; line-height: 1.8; color: #cdd8ff; }
.hero__code .k { color: #7cf0e0; }
.hero__code .s { color: #ffd479; }
.hero__code .c { color: #6b7aa8; }

/* Grids / cards ----------------------------------------------------------- */
.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card--link:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #d2dcf0; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--color-text-muted); margin: 0; font-size: 1rem; }
.card__icon {
    width: 52px; height: 52px; border-radius: 13px;
    background: var(--color-primary-soft); color: var(--color-primary);
    display: grid; place-items: center; font-size: 1.6rem; margin-bottom: 18px;
}
.card__more { display: inline-block; margin-top: 16px; font-weight: 600; font-size: .95rem; }
.card__more::after { content: " →"; }

/* Service / portfolio cards */
.svc-card { display: flex; flex-direction: column; height: 100%; }
.proj-card { overflow: hidden; padding: 0; display: flex; flex-direction: column; height: 100%; }
.proj-card__media { aspect-ratio: 16/9; background: linear-gradient(135deg, var(--color-bg-muted), var(--color-primary-soft)); display: grid; place-items: center; color: var(--color-primary); font-size: 2.4rem; font-weight: 800; }
.proj-card__media img { width: 100%; height: 100%; object-fit: cover; }
.proj-card__body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.proj-card__meta { color: var(--color-text-soft); font-size: .85rem; margin-bottom: 8px; text-transform: uppercase; letter-spacing: .04em; }
.proj-card__body p { color: var(--color-text-muted); margin: 0 0 16px; }
.proj-card__body .card__more { margin-top: auto; }

/* Feature list ------------------------------------------------------------ */
.feature-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.feature-list li { position: relative; padding-left: 34px; color: var(--color-text); }
.feature-list li::before {
    content: "✓"; position: absolute; left: 0; top: 1px;
    width: 22px; height: 22px; border-radius: 50%;
    background: var(--color-success-bg); color: var(--color-success-text);
    display: grid; place-items: center; font-size: .8rem; font-weight: 700;
}

.tag { display: inline-block; background: var(--color-bg-muted); color: var(--color-text-muted); border-radius: 999px; padding: 5px 13px; font-size: .85rem; font-weight: 600; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }

/* Steps ------------------------------------------------------------------- */
.steps { counter-reset: step; display: grid; gap: 24px; grid-template-columns: repeat(4, 1fr); }
.step { position: relative; padding-top: 12px; }
.step__num { font-size: 2.4rem; font-weight: 800; color: var(--color-primary); opacity: .25; line-height: 1; }
.step h3 { margin: 8px 0 6px; }
.step p { color: var(--color-text-muted); margin: 0; font-size: .98rem; }

/* CTA band ---------------------------------------------------------------- */
.cta {
    background: linear-gradient(135deg, #16234a, #2c5cff 140%);
    color: #fff;
    border-radius: var(--radius-lg);
    padding: clamp(32px, 5vw, 56px);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    box-shadow: var(--shadow-lg);
}
.cta h2 { color: #fff; }
.cta p { color: rgba(255,255,255,.82); margin: 0; font-size: 1.1rem; }

/* Forms ------------------------------------------------------------------- */
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-weight: 600; font-size: .95rem; margin-bottom: 7px; }
.form-control, input[type="text"], input[type="email"], input[type="tel"], textarea {
    width: 100%;
    font: inherit;
    color: var(--color-text);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 13px 15px;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.form-control:focus, input:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-soft);
}
textarea { resize: vertical; min-height: 110px; }
.form-error { color: var(--color-error-text); font-size: .88rem; margin-top: 6px; }
.form-card { background: #fff; border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.form-note { color: var(--color-text-soft); font-size: .85rem; margin-top: 4px; }

/* CTA form on dark band -> keep inputs light */
.cta .form-card { color: var(--color-text); }

/* Flash ------------------------------------------------------------------- */
.flash { border-radius: var(--radius-sm); padding: 14px 18px; margin-bottom: 18px; font-weight: 500; }
.flash--success { background: var(--color-success-bg); color: var(--color-success-text); }
.flash--error { background: var(--color-error-bg); color: var(--color-error-text); }

/* Page header (inner pages) ---------------------------------------------- */
.page-hero {
    background:
        radial-gradient(900px 380px at 85% -20%, rgba(44,92,255,.10), transparent 60%),
        var(--color-bg-soft);
    padding: clamp(40px, 6vw, 72px) 0;
    border-bottom: 1px solid var(--color-border);
}
.breadcrumbs { font-size: .9rem; color: var(--color-text-soft); margin-bottom: 14px; }
.breadcrumbs a { color: var(--color-text-muted); }
.page-hero h1 { margin: 0 0 12px; }
.page-hero p { color: var(--color-text-muted); font-size: 1.15rem; max-width: 680px; margin: 0; }

/* Prose ------------------------------------------------------------------- */
.prose { max-width: 760px; }
.prose h2 { margin-top: 1.4em; }
.prose h3 { margin-top: 1.2em; }
.prose ul { padding-left: 1.2em; }
.prose li { margin-bottom: .4em; }

/* Footer ------------------------------------------------------------------ */
.site-footer { background: #0e1730; color: #aeb7cc; padding: 56px 0 28px; }
.site-footer a { color: #cfd6e8; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 36px; }
.site-footer .brand { color: #fff; margin-bottom: 14px; }
.site-footer .brand:hover { color: #fff; }
.footer-col h4 { color: #fff; font-size: .95rem; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 16px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-about { color: #8c97b3; font-size: .95rem; max-width: 320px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 40px; padding-top: 22px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: #7a85a3; font-size: .9rem; }

/* Misc -------------------------------------------------------------------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 22px; }
.contact-list dt { color: var(--color-text-soft); font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 2px; }
.contact-list dd { margin: 0; font-weight: 600; font-size: 1.1rem; }
.divider { height: 1px; background: var(--color-border); border: 0; margin: 0; }
.center { text-align: center; }
.mt-32 { margin-top: 32px; }
.requisites { font-size: .95rem; color: var(--color-text-muted); }
.requisites b { color: var(--color-text); }

/* Responsive -------------------------------------------------------------- */
@media (max-width: 940px) {
    .hero__inner { grid-template-columns: 1fr; }
    .hero__art { order: -1; min-height: 220px; }
    .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .cta { grid-template-columns: 1fr; gap: 28px; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
    body { font-size: 16px; }
    .nav, .header-phone { display: none; }
    .nav-toggle { display: inline-flex; }
    .site-header.is-open .nav {
        display: flex; flex-direction: column; align-items: stretch;
        position: absolute; top: var(--header-h); left: 0; right: 0;
        background: #fff; border-bottom: 1px solid var(--color-border);
        padding: 12px var(--gutter) 18px; gap: 2px;
        box-shadow: var(--shadow);
    }
    .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .hero__stats { gap: 24px; }
}