/* =============================================================================
   AiCloudTechno — landing page stylesheet
   Self-hosted, no third-party origins, no @import (supply-chain safe).
   Uses only a handful of CSS features supported by every modern browser.
   ========================================================================== */

:root {
    --bg:        #0b1020;
    --bg-soft:   #10172b;
    --bg-card:   #141d33;
    --border:    #22304f;
    --text:      #e6ecf7;
    --muted:     #9fb0cc;
    --accent:    #4f8cff;
    --accent-2:  #7c5cff;
    --accent-3:  #35d0c4;
    --radius:    14px;
    --maxw:      1120px;
    --gap:       clamp(1rem, 3vw, 2rem);
}

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

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

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1.0625rem;
    line-height: 1.65;
    color: var(--text);
    background:
        radial-gradient(900px 520px at 12% -10%, rgba(124, 92, 255, .22), transparent 60%),
        radial-gradient(760px 460px at 88% -20%, rgba(79, 140, 255, .22), transparent 62%),
        var(--bg);
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: var(--accent);
    text-decoration: none;
    transition: color .18s ease, background-color .18s ease, border-color .18s ease;
}
a:hover { color: var(--accent-3); }
/* Visible focus for keyboard users only — no layout shift for mouse users. */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-3);
    outline-offset: 3px;
    border-radius: 4px;
}

h1, h2, h3 { line-height: 1.18; letter-spacing: -.02em; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 5.2vw, 3.35rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 750; }
h3 { font-size: 1.15rem; font-weight: 700; }
p  { margin: 0 0 1.1em; color: var(--muted); }
p:last-child { margin-bottom: 0; }

/* --- Layout -------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--maxw);
    margin-inline: auto;
    padding-inline: var(--gap);
}
.narrow { max-width: 760px; }

.section { padding-block: clamp(3.5rem, 8vw, 6rem); }
.section-alt {
    background: linear-gradient(180deg, rgba(255,255,255,.02), transparent);
    border-block: 1px solid var(--border);
}
.section-intro { max-width: 60ch; font-size: 1.075rem; }

/* --- Skip link (accessibility) ------------------------------------------- */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 100;
    padding: .7rem 1rem;
    background: var(--accent);
    color: #fff;
    border-radius: 0 0 var(--radius) 0;
    font-weight: 600;
}
.skip-link:focus {
    left: 0;
    color: #fff;
}

/* --- Header / nav -------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(11, 16, 32, .78);
    backdrop-filter: saturate(160%) blur(10px);
    border-bottom: 1px solid var(--border);
}
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--gap);
    min-height: 66px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    color: var(--text);
    font-weight: 750;
    font-size: 1.1rem;
    letter-spacing: -.01em;
}
.brand:hover { color: var(--text); }
.brand-mark {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 11px;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.brand-text em { font-style: normal; color: var(--accent); }

.nav-links {
    display: flex;
    align-items: center;
    gap: clamp(.9rem, 2.4vw, 1.9rem);
    list-style: none;
    margin: 0;
    padding: 0;
}
.nav-links a { color: var(--muted); font-weight: 550; font-size: .97rem; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
    padding: .5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text) !important;
    background: rgba(79, 140, 255, .12);
}
.nav-cta:hover { border-color: var(--accent); background: rgba(79, 140, 255, .22); }

/* --- Hero ---------------------------------------------------------------- */
.hero { padding-block: clamp(4rem, 11vw, 8rem); }
.hero-inner { max-width: 860px; }
.eyebrow {
    display: inline-block;
    margin: 0 0 1.1rem;
    padding: .34rem .8rem;
    font-size: .8rem;
    font-weight: 650;
    letter-spacing: .09em;
    text-transform: uppercase;
    color: var(--accent-3);
    background: rgba(53, 208, 196, .10);
    border: 1px solid rgba(53, 208, 196, .30);
    border-radius: 999px;
}
.lead {
    font-size: clamp(1.05rem, 2.1vw, 1.24rem);
    color: var(--muted);
    max-width: 62ch;
    margin-bottom: 2rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: .85rem; margin-bottom: 3rem; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .8rem 1.5rem;
    border-radius: 999px;
    font-weight: 650;
    font-size: 1rem;
    border: 1px solid transparent;
    cursor: pointer;
}
.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    box-shadow: 0 10px 30px -12px rgba(79, 140, 255, .8);
}
.btn-primary:hover { color: #fff; filter: brightness(1.08); }
.btn-ghost {
    color: var(--text);
    border-color: var(--border);
    background: rgba(255, 255, 255, .03);
}
.btn-ghost:hover { color: var(--text); border-color: var(--accent); }

.stat-row {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    list-style: none;
    margin: 0;
    padding: 1.4rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(20, 29, 51, .6);
}
.stat-row li { display: grid; gap: .15rem; }
.stat-row strong { font-size: 1.35rem; font-weight: 750; color: var(--text); }
.stat-row span { font-size: .86rem; color: var(--muted); }

/* --- Cards --------------------------------------------------------------- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
    gap: 1.15rem;
    margin-top: 2.2rem;
}
.card {
    padding: 1.6rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: transform .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card p { font-size: .965rem; margin: 0; }

/* --- Blog CTA ------------------------------------------------------------ */
.blog-cta { text-align: center; }
.blog-cta p { margin-inline: auto; max-width: 52ch; margin-bottom: 1.6rem; }

/* --- Footer -------------------------------------------------------------- */
.site-footer {
    border-top: 1px solid var(--border);
    background: var(--bg-soft);
    padding-block: 2.4rem;
}
.footer-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.1rem;
}
.footer-brand { margin: 0; font-weight: 750; color: var(--text); }
.footer-brand em { font-style: normal; color: var(--accent); }
.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}
.footer-links a { color: var(--muted); font-size: .95rem; }
.footer-links a:hover { color: var(--text); }
.footer-meta { margin: 0; color: var(--muted); font-size: .9rem; display: flex; gap: .6rem; align-items: center; }
.footer-meta .sep { opacity: .45; }

/* --- Responsive ---------------------------------------------------------- */
@media (max-width: 760px) {
    .nav { min-height: 60px; }
    .nav-links { gap: .85rem; }
    .nav-links a { font-size: .9rem; }
    .stat-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 430px) {
    .nav-links li:not(:last-child) { display: none; }
}

/* --- Motion preferences -------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
    .card:hover { transform: none; }
}

/* --- Print --------------------------------------------------------------- */
@media print {
    .site-header, .skip-link, .hero-actions, .btn { display: none !important; }
    body { background: #fff; color: #000; }
    p, .muted { color: #000; }
}