/* ═══════════════════════════════════════════════════════════════════
   CORE923 GROUP — Design system + components
   Dark theme with electric cyan + violet accents.
   Inspired by Endava (clean grids), Geotab (industry trust bars),
   Palantir / Linear (futuristic minimalism).
   ═══════════════════════════════════════════════════════════════════ */

:root {
    --bg:           #0A0E1A;
    --bg-elevated: #131829;
    --bg-surface:  #1A2138;
    --bg-glass:    rgba(255, 255, 255, .04);

    --text:        #F1F5F9;
    --text-muted:  #94A3B8;
    --text-dim:    #64748B;

    --accent:      #00D9FF;
    --accent-hi:   #22F1FF;
    --accent-dim:  rgba(0, 217, 255, .15);

    --violet:      #8B5CF6;
    --violet-hi:   #A78BFA;
    --violet-dim:  rgba(139, 92, 246, .15);

    --mint:        #4ADE80;
    --warn:        #FBBF24;

    --border:      rgba(255, 255, 255, .08);
    --border-hi:   rgba(0, 217, 255, .25);

    --f-sans:    'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --f-mono:    'JetBrains Mono', 'Fira Code', SF Mono, Consolas, monospace;
    --f-display: 'Inter', system-ui, sans-serif;

    --r-sm: 6px; --r-md: 10px; --r-lg: 16px; --r-xl: 24px; --r-pill: 999px;
    --container: 1280px;
    --header-h: 72px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--f-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Subtle ambient gradient — futuristic depth without performance cost */
body::before {
    content: '';
    position: fixed; inset: 0; z-index: -1; pointer-events: none;
    background:
        radial-gradient(ellipse at 20% 0%, rgba(0, 217, 255, .08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(139, 92, 246, .06) 0%, transparent 50%);
}

a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: var(--accent-hi); }
img, svg { max-width: 100%; display: block; }

h1, h2, h3, h4, h5 { font-family: var(--f-display); font-weight: 700; letter-spacing: -.02em; line-height: 1.15; color: var(--text); }
h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.3rem, 2.2vw, 1.6rem); }
h4 { font-size: 1.1rem; font-weight: 600; }

p { font-size: 1rem; color: var(--text); }
.muted { color: var(--text-muted); }
.dim { color: var(--text-dim); }
.mono { font-family: var(--f-mono); font-size: .92em; }

/* ─── Layout ─── */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 880px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-tight { padding: 48px 0; }

/* ─── Header / Nav ─── */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--header-h);
    backdrop-filter: blur(16px);
    background: rgba(10, 14, 26, .72);
    border-bottom: 1px solid var(--border);
    transition: background .25s;
}
.site-header.scrolled { background: rgba(10, 14, 26, .92); }
.site-header-inner {
    max-width: var(--container); margin: 0 auto;
    height: 100%;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px;
    gap: 24px;
}
.brand {
    display: flex; align-items: center; gap: 10px;
    font-family: var(--f-display); font-weight: 800; font-size: 1.08rem;
    color: var(--text); letter-spacing: -.01em;
}
.brand-mark {
    width: 32px; height: 32px; border-radius: 8px;
    background: linear-gradient(135deg, var(--accent), var(--violet));
    display: inline-flex; align-items: center; justify-content: center;
    color: #0A0E1A; font-weight: 900; font-size: .8rem;
    box-shadow: 0 0 24px rgba(0, 217, 255, .35);
}
.nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
    padding: 8px 14px; border-radius: var(--r-md);
    color: var(--text-muted); font-size: .92rem; font-weight: 500;
    transition: color .15s, background .15s;
}
.nav-link:hover { color: var(--text); background: var(--bg-glass); }
.nav-cta {
    background: var(--accent);
    color: var(--bg) !important;
    padding: 9px 18px;
    border-radius: var(--r-md);
    font-weight: 600;
    font-size: .92rem;
    transition: all .2s;
    border: 1px solid var(--accent);
}
.nav-cta:hover {
    background: var(--accent-hi);
    color: var(--bg) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(0, 217, 255, .35);
}
.menu-toggle {
    display: none;
    background: transparent; border: 1px solid var(--border);
    color: var(--text); padding: 8px 12px; border-radius: var(--r-md);
    cursor: pointer; font-size: 1.1rem;
}

/* ─── Hero ─── */
.hero {
    position: relative;
    padding: calc(var(--header-h) + 80px) 0 80px;
    overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; inset: 0; pointer-events: none; z-index: 0;
    background: radial-gradient(ellipse 800px 400px at 50% 0%, rgba(0, 217, 255, .12) 0%, transparent 70%);
}
.hero-grid {
    position: absolute; inset: 0; z-index: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(0, 217, 255, .07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 217, 255, .07) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 30%, transparent 80%);
}
.hero-content { position: relative; z-index: 2; max-width: 880px; }
.eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 14px; border-radius: var(--r-pill);
    background: var(--accent-dim);
    border: 1px solid var(--border-hi);
    color: var(--accent-hi);
    font-size: .8rem; font-weight: 600; letter-spacing: .04em;
    text-transform: uppercase;
    margin-bottom: 24px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); }

.hero h1 {
    margin-bottom: 24px;
    background: linear-gradient(120deg, var(--text) 0%, var(--text) 50%, var(--accent-hi) 100%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero h1 .mark { color: var(--accent); -webkit-text-fill-color: var(--accent); }

.hero-sub { font-size: 1.18rem; color: var(--text-muted); max-width: 680px; margin-bottom: 36px; line-height: 1.6; }

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 26px;
    border-radius: var(--r-md);
    font-weight: 600; font-size: 1rem;
    transition: all .2s;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
}
.btn-primary {
    background: var(--accent);
    color: var(--bg) !important;
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(0, 217, 255, .25);
}
.btn-primary:hover {
    background: var(--accent-hi);
    color: var(--bg) !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 217, 255, .4);
}
.btn-ghost {
    background: var(--bg-glass);
    color: var(--text);
    border-color: var(--border);
    backdrop-filter: blur(8px);
}
.btn-ghost:hover {
    background: rgba(255, 255, 255, .08);
    border-color: var(--accent);
    color: var(--accent-hi);
}
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(4px); }

/* ─── Trust bar ─── */
.trust-bar {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 40px 0;
    background: rgba(255, 255, 255, .015);
}
.trust-bar-label {
    text-align: center;
    font-size: .78rem; font-weight: 600; letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 24px;
}
.trust-logos {
    display: flex; justify-content: center; align-items: center;
    flex-wrap: wrap; gap: 56px;
    opacity: .8;
}
.trust-logo {
    color: var(--text-muted);
    font-family: var(--f-display);
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: .02em;
    transition: color .2s;
}
.trust-logo:hover { color: var(--text); }

/* ─── Section heads ─── */
.section-head {
    text-align: center;
    margin-bottom: 48px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}
.section-eyebrow {
    display: inline-block;
    color: var(--accent);
    font-size: .8rem; font-weight: 600; letter-spacing: .14em;
    text-transform: uppercase;
    margin-bottom: 12px;
}
.section-head h2 { margin-bottom: 16px; }
.section-head p { color: var(--text-muted); font-size: 1.08rem; line-height: 1.6; }

/* ─── Service grid ─── */
.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.service-card {
    position: relative;
    padding: 28px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    transition: all .25s;
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.service-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--violet));
    transform: scaleX(0); transform-origin: left;
    transition: transform .35s ease;
}
.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hi);
    background: var(--bg-surface);
    box-shadow: 0 12px 40px rgba(0, 0, 0, .3);
}
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
    width: 48px; height: 48px;
    border-radius: var(--r-md);
    background: var(--accent-dim);
    border: 1px solid var(--border-hi);
    display: inline-flex; align-items: center; justify-content: center;
    color: var(--accent);
    margin-bottom: 20px;
}
.service-icon svg { width: 24px; height: 24px; }
.service-card h3 { margin-bottom: 10px; font-size: 1.18rem; }
.service-card .card-desc { color: var(--text-muted); font-size: .94rem; line-height: 1.55; margin-bottom: 16px; flex: 1; }
.service-techstack {
    display: flex; flex-wrap: wrap; gap: 6px;
    margin-bottom: 18px;
}
.service-techstack span {
    font-family: var(--f-mono);
    font-size: .72rem;
    padding: 3px 8px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    color: var(--text-muted);
}
.service-link {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--accent); font-weight: 600; font-size: .9rem;
}
.service-card:hover .service-link { color: var(--accent-hi); }

/* ─── Industry verticals grid ─── */
.industry-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.industry-card {
    padding: 32px 28px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    transition: all .25s;
    text-decoration: none;
    color: inherit;
}
.industry-card:hover { border-color: var(--border-hi); background: var(--bg-surface); }
.industry-card h3 { margin-bottom: 12px; }
.industry-card .card-desc { color: var(--text-muted); font-size: .96rem; line-height: 1.6; margin-bottom: 18px; }
.industry-card .compliance-row {
    display: flex; flex-wrap: wrap; gap: 6px;
    margin-top: 16px;
}
.compliance-badge {
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .06em;
    padding: 4px 10px;
    border-radius: var(--r-sm);
    background: var(--violet-dim);
    color: var(--violet-hi);
    border: 1px solid rgba(139, 92, 246, .3);
}

/* ─── Stats strip ─── */
.stats-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border);
    border-radius: var(--r-lg);
    overflow: hidden;
    border: 1px solid var(--border);
}
.stat {
    background: var(--bg-elevated);
    padding: 32px 24px;
    text-align: center;
}
.stat-num {
    font-family: var(--f-display);
    font-weight: 800;
    font-size: 2.6rem;
    background: linear-gradient(120deg, var(--accent), var(--violet));
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}
.stat-label { color: var(--text-muted); font-size: .88rem; margin-top: 8px; }

/* ─── CTA band ─── */
.cta-band {
    position: relative;
    background:
        radial-gradient(ellipse 600px 300px at 50% 0%, rgba(139, 92, 246, .15) 0%, transparent 70%),
        var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 80px 0;
    text-align: center;
}
.cta-band h2 { max-width: 720px; margin: 0 auto 16px; }
.cta-band p { color: var(--text-muted); font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; }

/* ─── Footer ─── */
.footer { background: var(--bg); border-top: 1px solid var(--border); padding: 64px 0 32px; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--border);
}
.footer h4 {
    font-size: .85rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--text);
    margin-bottom: 16px;
}
.footer-list { list-style: none; }
.footer-list li { margin-bottom: 10px; }
.footer-list a { color: var(--text-muted); font-size: .92rem; }
.footer-list a:hover { color: var(--text); }
.footer-blurb { color: var(--text-muted); font-size: .92rem; line-height: 1.6; max-width: 360px; margin-top: 16px; }
.footer-bottom {
    padding-top: 32px;
    display: flex; justify-content: space-between; align-items: center;
    color: var(--text-dim);
    font-size: .82rem;
    flex-wrap: wrap;
    gap: 12px;
}

/* ═══════════════════════════════════════════════════════════════════
   Service detail page
   ═══════════════════════════════════════════════════════════════════ */

.svc-hero { padding: calc(var(--header-h) + 60px) 0 48px; position: relative; overflow: hidden; }
.svc-hero::before {
    content: ''; position: absolute; inset: 0; pointer-events: none; z-index: 0;
    background: radial-gradient(ellipse 700px 350px at 30% 0%, rgba(0, 217, 255, .1) 0%, transparent 70%);
}
.svc-hero > .container { position: relative; z-index: 2; }
.svc-hero h1 { margin-bottom: 18px; max-width: 800px; }
.svc-hero .lead { font-size: 1.18rem; color: var(--text-muted); max-width: 720px; line-height: 1.6; }

.breadcrumb {
    display: flex; align-items: center; gap: 8px;
    font-size: .85rem; color: var(--text-muted);
    margin-bottom: 24px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--text-dim); }

.svc-section { padding: 64px 0; border-top: 1px solid var(--border); }
.svc-section h2 { margin-bottom: 24px; }
.svc-section p { color: var(--text-muted); margin-bottom: 16px; max-width: 760px; line-height: 1.7; }

.svc-capability-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 32px;
}
.svc-capability {
    padding: 24px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
}
.svc-capability h4 { margin-bottom: 8px; color: var(--accent); font-size: .98rem; }
.svc-capability p { color: var(--text-muted); font-size: .92rem; margin: 0; line-height: 1.55; }

.approach-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 32px;
}
.approach-step {
    padding: 28px 24px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
}
.approach-num {
    font-family: var(--f-mono);
    font-size: .8rem; font-weight: 600;
    color: var(--accent);
    margin-bottom: 12px;
    letter-spacing: .1em;
}
.approach-step h4 { margin-bottom: 8px; font-size: 1.05rem; }
.approach-step p { color: var(--text-muted); font-size: .9rem; margin: 0; line-height: 1.55; }

.tech-matrix {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    margin-top: 24px;
}
.tech-pill {
    padding: 14px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    font-family: var(--f-mono);
    font-size: .82rem;
    color: var(--text);
    text-align: center;
    transition: all .15s;
}
.tech-pill:hover { border-color: var(--accent); color: var(--accent-hi); background: var(--accent-dim); }

.case-card {
    padding: 32px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    margin-bottom: 16px;
}
.case-card .case-meta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.case-tag {
    font-size: .72rem; font-weight: 700;
    letter-spacing: .06em;
    padding: 4px 10px; border-radius: var(--r-pill);
    background: var(--violet-dim);
    color: var(--violet-hi);
    border: 1px solid rgba(139, 92, 246, .3);
}
.case-card h3 { margin-bottom: 14px; }
.case-card .case-section {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 20px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}
.case-card .case-section:last-of-type { border-bottom: 0; }
.case-card .case-label {
    font-family: var(--f-mono); font-size: .78rem;
    color: var(--accent); font-weight: 600;
    letter-spacing: .08em; text-transform: uppercase;
    padding-top: 2px;
}
.case-card .case-content { color: var(--text-muted); font-size: .96rem; line-height: 1.6; }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
    .service-grid, .industry-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-strip { grid-template-columns: repeat(2, 1fr); }
    .approach-steps { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
    .nav { display: none; }
    .menu-toggle { display: inline-flex; align-items: center; gap: 6px; }
    .nav.is-open {
        display: flex;
        position: absolute; top: 100%; left: 0; right: 0;
        background: var(--bg-elevated);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
    }
    .nav.is-open .nav-link, .nav.is-open .nav-cta { width: 100%; padding: 12px 16px; text-align: left; justify-content: flex-start; }

    .hero { padding: calc(var(--header-h) + 48px) 0 48px; }
    .hero-sub { font-size: 1.02rem; }
    .cta-row .btn { width: 100%; justify-content: center; }
    .trust-logos { gap: 28px; }
    .trust-logo { font-size: 1.05rem; }
    .service-grid, .industry-grid { grid-template-columns: 1fr; gap: 14px; }
    .service-card { padding: 22px; }
    .stats-strip { grid-template-columns: repeat(2, 1fr); }
    .stat { padding: 22px 16px; }
    .stat-num { font-size: 2rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .svc-capability-grid { grid-template-columns: 1fr; }
    .approach-steps { grid-template-columns: 1fr; }
    .case-card { padding: 22px; }
    .case-card .case-section { grid-template-columns: 1fr; gap: 6px; }
}

/* ─── Reveal-on-scroll ─── */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s, transform .6s; }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
}