/* ============================================================================
   Query Craft Academy — Power BI visuals product & support site
   Modern dark theme, glassmorphism, glow, 3D coverflow showcase.
   ============================================================================ */
:root {
    --bg: #080b12;
    --bg2: #0d1117;
    --panel: #131a27;
    --panel2: #1a2334;
    --border: #243049;
    --ink: #e7ecf5;
    --muted: #95a1b8;
    --accent: #4aa3ff;
    --accent-2: #7c5cff;
    --cyan: #36d6e7;
    --green: #56d364;
    --amber: #e3b341;
    --red: #ff7b72;
    --radius: 16px;
    --maxw: 1180px;
    --shadow: 0 20px 60px rgba(0, 0, 0, .5);
    --glow: 0 0 40px rgba(74, 163, 255, .25);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    background: var(--bg);
    color: var(--ink);
    font-family: "Inter", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
section { position: relative; padding: 96px 0; }
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.eyebrow {
    text-transform: uppercase; letter-spacing: 3px; font-size: 12px; font-weight: 700;
    color: var(--accent); margin-bottom: 14px;
}
h1, h2, h3 { line-height: 1.15; letter-spacing: -.02em; font-weight: 800; }
h2.section-title { font-size: clamp(28px, 4vw, 44px); margin-bottom: 14px; }
.section-sub { color: var(--muted); font-size: 18px; max-width: 640px; margin-bottom: 48px; }
.center { text-align: center; margin-left: auto; margin-right: auto; }
.grad-text {
    background: linear-gradient(110deg, var(--accent), var(--cyan) 45%, var(--accent-2));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---- background decoration ---- */
.bg-orbs { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.orb.o1 { width: 520px; height: 520px; background: #1d4fd8; top: -160px; left: -120px; animation: float1 18s ease-in-out infinite; }
.orb.o2 { width: 460px; height: 460px; background: #6b2fd6; top: 30%; right: -160px; animation: float2 22s ease-in-out infinite; }
.orb.o3 { width: 420px; height: 420px; background: #0e7490; bottom: -180px; left: 25%; animation: float1 26s ease-in-out infinite; }
.grid-overlay {
    position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .35;
    background-image: linear-gradient(rgba(74,163,255,.05) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(74,163,255,.05) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 80%);
}
@keyframes float1 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(40px,50px)} }
@keyframes float2 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(-50px,40px)} }

/* ---- nav ---- */
header.nav {
    position: sticky; top: 0; z-index: 100;
    backdrop-filter: blur(14px); background: rgba(8, 11, 18, .72);
    border-bottom: 1px solid transparent; transition: border-color .3s, background .3s;
}
header.nav.scrolled { border-bottom-color: var(--border); background: rgba(8, 11, 18, .9); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 17px; }
.brand .logo {
    width: 30px; height: 30px; border-radius: 8px;
    background: conic-gradient(from 200deg, var(--accent), var(--accent-2), var(--cyan), var(--accent));
    box-shadow: var(--glow);
}
.nav-links { display: flex; gap: 26px; margin-left: auto; }
.nav-links a { color: var(--muted); font-size: 15px; font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--ink); }
.btn {
    display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px;
    padding: 11px 20px; border-radius: 10px; cursor: pointer; border: 1px solid transparent;
    transition: transform .18s cubic-bezier(.34,1.56,.64,1), box-shadow .25s, background .25s, border-color .25s;
    white-space: nowrap;
}
.btn-primary { background: linear-gradient(110deg, var(--accent), var(--accent-2)); color: #fff; box-shadow: 0 8px 26px rgba(74,163,255,.35); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 38px rgba(74,163,255,.5); }
.btn-ghost { background: rgba(255,255,255,.04); color: var(--ink); border-color: var(--border); }
.btn-ghost:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--glow); }
.nav .btn { padding: 9px 16px; }
.nav-toggle { display: none; background: none; border: none; color: var(--ink); font-size: 24px; cursor: pointer; }

/* ---- hero ---- */
.hero { padding: 110px 0 90px; text-align: center; }
.hero h1 { font-size: clamp(38px, 6.5vw, 76px); margin-bottom: 22px; }
.hero p.lead { font-size: clamp(17px, 2.2vw, 21px); color: var(--muted); max-width: 680px; margin: 0 auto 36px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.badge-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 40px; }
.pill {
    font-size: 13px; color: var(--muted); padding: 7px 14px; border-radius: 999px;
    border: 1px solid var(--border); background: rgba(255,255,255,.03); display: inline-flex; align-items: center; gap: 7px;
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }

/* ---- product cards ---- */
.products-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.product {
    background: linear-gradient(180deg, var(--panel), var(--bg2));
    border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
    transition: transform .3s, box-shadow .3s, border-color .3s; position: relative;
}
.product::before {
    content: ""; position: absolute; inset: 0; border-radius: var(--radius); padding: 1px;
    background: linear-gradient(130deg, transparent, rgba(74,163,255,.4), transparent);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity .3s;
}
.product:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.product:hover::before { opacity: 1; }
.product .thumb { aspect-ratio: 16/9; overflow: hidden; border-bottom: 1px solid var(--border); background: #000; }
.product .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.product:hover .thumb img { transform: scale(1.05); }
.product .body { padding: 24px; }
.product .tag { font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; }
.product.plan .tag { color: var(--accent-2); }
.product.tracker .tag { color: var(--accent); }
.product h3 { font-size: 24px; margin: 8px 0 10px; }
.product p { color: var(--muted); margin-bottom: 16px; }
.feat-list { list-style: none; display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.feat-list li { display: flex; gap: 10px; font-size: 14.5px; color: var(--ink); }
.feat-list li::before { content: "▸"; color: var(--accent); }
.product .actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---- coverflow showcase ---- */
.showcase { padding-top: 64px; }
.coverflow-stage {
    position: relative; height: 460px; perspective: 1600px; margin: 20px 0 10px;
}
.coverflow { position: absolute; inset: 0; transform-style: preserve-3d; }
.cf-item {
    position: absolute; top: 50%; left: 50%; width: 620px; max-width: 78vw; aspect-ratio: 16/9;
    margin: -0px 0 0 0; border-radius: 14px; overflow: hidden; cursor: pointer;
    border: 1px solid var(--border); background: #000;
    transition: transform .7s cubic-bezier(.4,.1,.2,1), opacity .7s, filter .7s, box-shadow .7s;
    will-change: transform, opacity;
}
.cf-item img { width: 100%; height: 100%; object-fit: cover; }
.cf-item .cf-cap {
    position: absolute; left: 0; right: 0; bottom: 0; padding: 30px 18px 14px;
    background: linear-gradient(transparent, rgba(5,8,14,.92));
    font-size: 14px; font-weight: 600; opacity: 0; transition: opacity .4s;
}
.cf-item.active .cf-cap { opacity: 1; }
.cf-item.active { box-shadow: 0 30px 70px rgba(0,0,0,.6), 0 0 50px rgba(74,163,255,.3); }
.coverflow-controls { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 26px; }
.cf-btn {
    width: 48px; height: 48px; border-radius: 50%; border: 1px solid var(--border);
    background: rgba(255,255,255,.04); color: var(--ink); font-size: 20px; cursor: pointer;
    display: grid; place-items: center; transition: transform .2s, border-color .2s, box-shadow .2s;
}
.cf-btn:hover { transform: scale(1.1); border-color: var(--accent); box-shadow: var(--glow); }
.cf-dots { display: flex; gap: 8px; flex-wrap: wrap; max-width: 420px; justify-content: center; }
.cf-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--border); cursor: pointer; transition: all .3s; border: none; }
.cf-dot.active { background: var(--accent); width: 26px; border-radius: 6px; box-shadow: 0 0 10px var(--accent); }

/* ---- simple setup / how it works ---- */
.setup-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 30px; }
.step-card {
    position: relative; background: rgba(255,255,255,.025); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 28px 24px; overflow: hidden;
    transition: transform .3s, border-color .3s;
}
.step-card:hover { transform: translateY(-6px); border-color: var(--accent); }
.step-num {
    font-size: 54px; font-weight: 900; line-height: 1; margin-bottom: 14px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text; background-clip: text; color: transparent; opacity: .9;
}
.step-card h3 { font-size: 19px; margin-bottom: 8px; }
.step-card p { color: var(--muted); font-size: 15px; }
.step-card .step-arrow { position: absolute; top: 30px; right: -12px; color: var(--border); font-size: 30px; }
.step-card code { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 1px 7px; font-size: 13px; color: var(--cyan); }

.security-band {
    margin-top: 12px; border-radius: 20px; padding: 36px 34px; position: relative; overflow: hidden;
    background: linear-gradient(120deg, rgba(86,211,100,.10), rgba(74,163,255,.10));
    border: 1px solid var(--border);
}
.security-inner { display: flex; align-items: center; gap: 30px; flex-wrap: wrap; }
.security-shield {
    width: 76px; height: 76px; border-radius: 20px; flex-shrink: 0; display: grid; place-items: center;
    font-size: 38px; background: linear-gradient(135deg, rgba(86,211,100,.2), rgba(74,163,255,.2));
    border: 1px solid var(--border); box-shadow: 0 0 40px rgba(86,211,100,.2);
}
.security-text { flex: 1; min-width: 260px; }
.security-text h3 { font-size: 22px; margin-bottom: 6px; }
.security-text p { color: var(--muted); }
.sec-points { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; }
.sec-points span {
    font-size: 13px; color: var(--ink); padding: 7px 13px; border-radius: 999px;
    border: 1px solid var(--border); background: rgba(0,0,0,.2); display: inline-flex; gap: 7px; align-items: center;
}
.sec-points span::before { content: "✓"; color: var(--green); font-weight: 800; }

/* ---- tutorials ---- */
.tut-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.tut-card {
    background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
    overflow: hidden; transition: transform .3s, border-color .3s, box-shadow .3s;
}
.tut-card:hover { transform: translateY(-6px); border-color: var(--accent); box-shadow: var(--glow); }
.tut-thumb { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #000; }
.tut-thumb img { width: 100%; height: 100%; object-fit: cover; opacity: .55; transition: opacity .3s, transform .5s; }
.tut-card:hover .tut-thumb img { opacity: .75; transform: scale(1.05); }
.tut-play {
    position: absolute; inset: 0; display: grid; place-items: center;
}
.tut-play span {
    width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center;
    background: rgba(74,163,255,.9); color: #fff; font-size: 24px; padding-left: 4px;
    box-shadow: 0 8px 30px rgba(74,163,255,.5); transition: transform .25s;
}
.tut-card:hover .tut-play span { transform: scale(1.12); }
.tut-badge {
    position: absolute; top: 12px; left: 12px; font-size: 11px; font-weight: 700; letter-spacing: .5px;
    text-transform: uppercase; padding: 5px 11px; border-radius: 999px;
    background: rgba(8,11,18,.8); border: 1px solid var(--border); color: var(--amber);
}
.tut-body { padding: 18px 20px; }
.tut-body .tut-tag { font-size: 12px; font-weight: 700; letter-spacing: .8px; text-transform: uppercase; color: var(--muted); }
.tut-body h3 { font-size: 17px; margin: 6px 0 4px; }
.tut-body p { color: var(--muted); font-size: 14px; }
.tut-note { text-align: center; color: var(--muted); margin-top: 26px; font-size: 14.5px; }
.tut-cat-title { font-size: 20px; font-weight: 800; margin: 28px 0 16px; }
.tut-cat-title:first-child { margin-top: 0; }
#tut-dynamic .tut-grid { margin-bottom: 8px; }

/* ---- features grid ---- */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feat-card {
    background: rgba(255,255,255,.025); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 26px; transition: transform .3s, border-color .3s, background .3s;
}
.feat-card:hover { transform: translateY(-6px); border-color: var(--accent); background: rgba(74,163,255,.06); }
.feat-icon {
    width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; font-size: 22px;
    margin-bottom: 16px; background: linear-gradient(135deg, rgba(74,163,255,.18), rgba(124,92,255,.18));
    border: 1px solid var(--border);
}
.feat-card h3 { font-size: 18px; margin-bottom: 8px; }
.feat-card p { color: var(--muted); font-size: 14.5px; }

/* ---- docs / downloads ---- */
.docs-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.doc-card {
    display: flex; align-items: center; gap: 16px; padding: 20px 22px;
    background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
    transition: transform .25s, border-color .25s, box-shadow .25s;
}
.doc-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--glow); }
.doc-ico { font-size: 28px; flex-shrink: 0; }
.doc-card h3 { font-size: 16px; margin-bottom: 2px; }
.doc-card p { color: var(--muted); font-size: 13.5px; }
.doc-card .arrow { margin-left: auto; color: var(--accent); font-size: 20px; }

/* ---- support ---- */
.support-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 26px; align-items: start; }
.support-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; }
.support-list { list-style: none; display: flex; flex-direction: column; gap: 16px; }
.support-list li { display: flex; gap: 14px; }
.support-list .n { width: 30px; height: 30px; border-radius: 8px; background: rgba(74,163,255,.14); color: var(--accent); display: grid; place-items: center; font-weight: 800; flex-shrink: 0; }
.support-list h4 { font-size: 15px; }
.support-list p { color: var(--muted); font-size: 14px; }

/* ---- contact ---- */
.contact-card {
    background: linear-gradient(180deg, var(--panel), var(--bg2)); border: 1px solid var(--border);
    border-radius: 20px; padding: 40px; max-width: 720px; margin: 0 auto;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; font-weight: 600; }
input, textarea {
    width: 100%; background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
    padding: 12px 14px; color: var(--ink); font-family: inherit; font-size: 15px; outline: none;
    transition: border-color .2s, box-shadow .2s;
}
input:focus, textarea:focus { border-color: var(--accent); box-shadow: var(--glow); }
textarea { resize: vertical; min-height: 120px; }
.form-status { margin-top: 14px; text-align: center; font-size: 14.5px; min-height: 20px; }
.form-status.ok { color: var(--green); }
.form-status.err { color: var(--red); }
.contact-meta { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; margin-top: 26px; color: var(--muted); font-size: 14px; }
.contact-meta a { color: var(--accent); }

/* ---- footer ---- */
footer.site {
    border-top: 1px solid var(--border); padding: 50px 0 34px; margin-top: 40px;
    background: rgba(5,8,14,.5);
}
.foot-inner { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.foot-links { display: flex; gap: 22px; flex-wrap: wrap; }
.foot-links a { color: var(--muted); font-size: 14px; transition: color .2s; }
.foot-links a:hover { color: var(--ink); }
.foot-bottom { margin-top: 24px; color: var(--muted); font-size: 13px; }

/* ---- scroll reveal ---- */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; } .reveal.d2 { transition-delay: .16s; } .reveal.d3 { transition-delay: .24s; }

/* ---- legal/content pages ---- */
.content-page { max-width: 820px; margin: 0 auto; padding: 60px 24px 100px; }
.content-page h1 { font-size: clamp(30px, 5vw, 46px); margin-bottom: 10px; }
.content-page .meta { color: var(--muted); margin-bottom: 30px; }
.content-page h2 { font-size: 22px; margin: 30px 0 10px; color: var(--accent); }
.content-page p, .content-page li { color: var(--ink); margin-bottom: 12px; }
.content-page ul { padding-left: 22px; margin-bottom: 12px; }
.content-page a.back { color: var(--accent); font-weight: 600; }
.content-page table { width: 100%; border-collapse: collapse; margin: 14px 0; }
.content-page th, .content-page td { border: 1px solid var(--border); padding: 9px 12px; text-align: left; font-size: 14.5px; }
.content-page th { background: var(--panel); }

/* ---- responsive ---- */
@media (max-width: 880px) {
    .nav-links { display: none; }
    .nav-toggle { display: block; }
    .products-grid, .feat-grid, .docs-grid, .support-grid, .form-row,
    .setup-steps, .tut-grid { grid-template-columns: 1fr; }
    .step-card .step-arrow { display: none; }
    section { padding: 70px 0; }
    .coverflow-stage { height: 340px; }
}