/* ============================================================
   Lui-P — dark theme design system
   ============================================================ */
:root {
  --bg:        #0a0e17;
  --bg-2:      #0f1524;
  --panel:     #131b2e;
  --panel-2:   #172136;
  --line:      #24314d;
  --line-soft: #1b2740;
  --ink:       #eaf0fb;
  --muted:     #9fb0cc;
  --faint:     #67769a;
  --cyan:      #38bdf8;
  --cyan-2:    #22d3ee;
  --violet:    #a78bfa;
  --grad:      linear-gradient(120deg, #22d3ee 0%, #38bdf8 45%, #a78bfa 100%);
  --grad-soft: linear-gradient(120deg, rgba(34,211,238,.16), rgba(167,139,250,.16));
  --ok:        #34d399;
  --danger:    #f87171;
  --radius:    16px;
  --shadow:    0 18px 50px -20px rgba(0,0,0,.75);
  --maxw:      1160px;
  --font:      'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font); line-height: 1.55; -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--cyan-2); }
img { max-width: 100%; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.eyebrow { text-transform: uppercase; letter-spacing: .16em; font-size: .74rem; font-weight: 700; color: var(--cyan); }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
section { position: relative; }

/* ---------- background glow ---------- */
.glow { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.glow::before, .glow::after {
  content: ''; position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5;
}
.glow::before { width: 620px; height: 620px; top: -220px; left: -140px; background: radial-gradient(circle, rgba(56,189,248,.35), transparent 65%); }
.glow::after  { width: 560px; height: 560px; top: 240px; right: -180px; background: radial-gradient(circle, rgba(167,139,250,.30), transparent 65%); }

/* ---------- header ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,14,23,.72); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.nav .wrap { display: flex; align-items: center; gap: 20px; height: 66px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 1.18rem; letter-spacing: -.01em; color: var(--ink); }
.brand .mark { width: 34px; height: 34px; border-radius: 9px; background: var(--grad); display: grid; place-items: center; color: #05070d; font-weight: 900; font-size: 1.05rem; box-shadow: 0 6px 18px -6px rgba(56,189,248,.7); }
.nav-links { display: flex; gap: 26px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--muted); font-weight: 500; font-size: .95rem; }
.nav-links a:hover { color: var(--ink); }
.nav-cta { margin-left: 6px; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; font-family: inherit; font-weight: 600; font-size: .96rem; padding: 12px 20px; border-radius: 12px; border: 1px solid transparent; cursor: pointer; transition: transform .12s, box-shadow .2s, background .2s, border-color .2s; white-space: nowrap; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--grad); color: #05070d; box-shadow: 0 10px 26px -10px rgba(56,189,248,.75); }
.btn-primary:hover { color: #05070d; box-shadow: 0 14px 32px -10px rgba(56,189,248,.9); }
.btn-ghost { background: rgba(255,255,255,.04); color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { background: rgba(255,255,255,.08); color: var(--ink); border-color: var(--cyan); }
.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

/* ---------- hero ---------- */
.hero { padding: 78px 0 60px; }
.hero h1 { font-size: clamp(2.3rem, 5.4vw, 4rem); line-height: 1.04; letter-spacing: -.025em; margin: 18px 0 20px; font-weight: 800; }
.hero p.lead { font-size: clamp(1.05rem, 2vw, 1.28rem); color: var(--muted); max-width: 640px; margin: 0 0 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 34px; margin-top: 46px; flex-wrap: wrap; }
.hero-stats .n { font-size: 1.9rem; font-weight: 800; }
.hero-stats .l { color: var(--faint); font-size: .86rem; }

/* ---------- section heading ---------- */
.sec-head { max-width: 640px; margin: 0 0 34px; }
.sec-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); letter-spacing: -.02em; margin: 12px 0 10px; font-weight: 800; }
.sec-head p { color: var(--muted); margin: 0; font-size: 1.03rem; }
.pad { padding: 66px 0; }

/* ---------- category filter ---------- */
.filters { display: flex; gap: 10px; flex-wrap: wrap; margin: 0 0 30px; }
.filter { padding: 9px 16px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255,255,255,.03); color: var(--muted); font-size: .9rem; font-weight: 600; cursor: pointer; font-family: inherit; transition: .15s; }
.filter:hover { border-color: var(--cyan); color: var(--ink); }
.filter.on { background: var(--grad-soft); border-color: var(--cyan); color: var(--ink); }

/* ---------- product grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.card {
  position: relative; display: flex; flex-direction: column; gap: 14px;
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 22px;
  transition: transform .16s, border-color .16s, box-shadow .16s;
}
.card:hover { transform: translateY(-4px); border-color: var(--cyan); box-shadow: var(--shadow); }
.card .ico { width: 46px; height: 46px; border-radius: 12px; background: var(--grad-soft); border: 1px solid var(--line); display: grid; place-items: center; }
.card .ico svg { width: 24px; height: 24px; fill: none; stroke: var(--cyan); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.card h3 { margin: 0; font-size: 1.14rem; font-weight: 700; letter-spacing: -.01em; }
.card .tag { color: var(--muted); font-size: .93rem; margin: 0; flex: 1; }
.card .foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 4px; }
.card .plat { font-size: .78rem; color: var(--faint); }
.card .arrow { color: var(--cyan); font-weight: 600; font-size: .9rem; display: inline-flex; align-items: center; gap: 4px; }
.pill { font-size: .68rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; padding: 4px 9px; border-radius: 999px; }
.pill-free { background: rgba(52,211,153,.14); color: var(--ok); border: 1px solid rgba(52,211,153,.3); }
.pill-web  { background: rgba(56,189,248,.14); color: var(--cyan); border: 1px solid rgba(56,189,248,.3); }
.pill-soon { background: rgba(167,139,250,.14); color: var(--violet); border: 1px solid rgba(167,139,250,.3); }
.card .badge-row { position: absolute; top: 18px; right: 18px; }

/* ---------- custom-software band ---------- */
.band { background: linear-gradient(135deg, rgba(34,211,238,.08), rgba(167,139,250,.08)); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.band-inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; }
.band h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); letter-spacing: -.02em; margin: 12px 0 14px; font-weight: 800; }
.band p { color: var(--muted); font-size: 1.06rem; margin: 0 0 24px; }
.band ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.band li { display: flex; gap: 11px; align-items: flex-start; color: var(--ink); font-size: .98rem; }
.band li svg { flex: none; width: 20px; height: 20px; stroke: var(--cyan); fill: none; stroke-width: 2; margin-top: 2px; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line-soft); padding: 42px 0 34px; color: var(--faint); }
footer .cols { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; margin-bottom: 26px; }
footer a { color: var(--muted); display: block; margin: 8px 0; font-size: .93rem; }
footer a:hover { color: var(--ink); }
footer .fh { color: var(--ink); font-weight: 700; margin-bottom: 6px; font-size: .95rem; }
footer .legal { border-top: 1px solid var(--line-soft); padding-top: 20px; font-size: .84rem; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- product detail ---------- */
.crumb { color: var(--faint); font-size: .9rem; margin: 26px 0 0; }
.detail-hero { display: grid; grid-template-columns: 1fr 340px; gap: 40px; padding: 26px 0 20px; align-items: start; }
.detail-hero .ico { width: 62px; height: 62px; border-radius: 15px; background: var(--grad-soft); border: 1px solid var(--line); display: grid; place-items: center; margin-bottom: 18px; }
.detail-hero .ico svg { width: 32px; height: 32px; fill: none; stroke: var(--cyan); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.detail-hero h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); letter-spacing: -.02em; margin: 0 0 12px; font-weight: 800; }
.detail-hero .tag { font-size: 1.15rem; color: var(--cyan); margin: 0 0 18px; font-weight: 500; }
.detail-hero .sum { color: var(--muted); font-size: 1.05rem; }
.buy-card { background: linear-gradient(180deg, var(--panel), var(--bg-2)); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; position: sticky; top: 86px; }
.buy-card .price { font-size: 1.5rem; font-weight: 800; margin: 0 0 4px; }
.buy-card .price small { font-size: .9rem; color: var(--faint); font-weight: 500; }
.buy-card .plat { color: var(--faint); font-size: .85rem; margin: 0 0 18px; }

.tiers { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 8px 0 0; }
.tier { border: 1px solid var(--line); border-radius: 14px; padding: 20px; background: rgba(255,255,255,.02); }
.tier.pro { border-color: rgba(167,139,250,.4); background: var(--grad-soft); }
.tier h4 { margin: 0 0 4px; font-size: 1.05rem; }
.tier .p { font-size: .82rem; color: var(--faint); margin: 0 0 14px; }
.tier ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.tier li { display: flex; gap: 9px; font-size: .93rem; color: var(--ink); }
.tier li svg { flex: none; width: 18px; height: 18px; stroke: var(--cyan); fill: none; stroke-width: 2; margin-top: 2px; }
.tier.pro li svg { stroke: var(--violet); }
.feat-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.feat-list li { display: flex; gap: 11px; align-items: flex-start; color: var(--ink); }
.feat-list li svg { flex: none; width: 20px; height: 20px; stroke: var(--cyan); fill: none; stroke-width: 2; margin-top: 3px; }
.block-h { font-size: 1.3rem; font-weight: 800; letter-spacing: -.01em; margin: 40px 0 18px; }

/* ---------- forms ---------- */
.form-wrap { max-width: 760px; margin: 0 auto; }
.fcard { background: linear-gradient(180deg, var(--panel), var(--bg-2)); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; }
.fsect { margin: 0 0 26px; }
.fsect > .lbl { text-transform: uppercase; letter-spacing: .12em; font-size: .72rem; font-weight: 700; color: var(--cyan); margin: 0 0 14px; }
.fld { margin-bottom: 16px; }
.fld label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: 7px; }
.fld .opt { font-weight: 400; color: var(--faint); font-size: .82rem; }
.fld input, .fld textarea, .fld select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 11px;
  font-size: 1rem; font-family: inherit; background: #0c1220; color: var(--ink); transition: .15s;
}
.fld input::placeholder, .fld textarea::placeholder { color: #55658a; }
.fld input:focus, .fld textarea:focus, .fld select:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(56,189,248,.15); }
.fld textarea { resize: vertical; min-height: 96px; }
.hint { font-size: .82rem; color: var(--faint); margin-top: 6px; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* add-one-at-a-time URL list */
.multi-input { display: flex; gap: 8px; }
.multi-input input { flex: 1; }
.multi-input .addbtn { flex: none; padding: 0 18px; border: 1px solid var(--line); background: var(--grad-soft); color: var(--ink); border-radius: 11px; font-weight: 600; font-family: inherit; cursor: pointer; transition: .15s; }
.multi-input .addbtn:hover { border-color: var(--cyan); }
.chiplist { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.urlchip { display: flex; align-items: center; gap: 10px; background: #0c1220; border: 1px solid var(--line); border-radius: 10px; padding: 9px 12px; font-size: .92rem; }
.urlchip .u { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--cyan); }
.urlchip .rm { color: var(--danger); cursor: pointer; font-weight: 700; padding: 0 4px; flex: none; }

.chips { display: flex; flex-wrap: wrap; gap: 9px; }
.chip { padding: 9px 15px; border: 1px solid var(--line); background: rgba(255,255,255,.03); border-radius: 999px; font-size: .9rem; color: var(--muted); cursor: pointer; font-family: inherit; user-select: none; transition: .15s; }
.chip.on { border-color: var(--cyan); background: var(--grad-soft); color: var(--ink); font-weight: 600; }

/* file dropzone */
.drop { border: 1.5px dashed var(--line); border-radius: 13px; padding: 26px; text-align: center; color: var(--muted); cursor: pointer; transition: .15s; background: rgba(255,255,255,.02); }
.drop:hover, .drop.over { border-color: var(--cyan); background: var(--grad-soft); color: var(--ink); }
.drop svg { width: 30px; height: 30px; stroke: var(--cyan); fill: none; stroke-width: 1.7; margin-bottom: 8px; }
.filelist { margin-top: 12px; display: grid; gap: 8px; }
.filerow { display: flex; align-items: center; gap: 10px; background: #0c1220; border: 1px solid var(--line); border-radius: 10px; padding: 9px 12px; font-size: .9rem; }
.filerow .nm { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.filerow .sz { color: var(--faint); font-size: .82rem; }
.filerow .rm { color: var(--danger); cursor: pointer; font-weight: 700; padding: 0 4px; }
.filerow .bar { height: 4px; background: var(--line); border-radius: 3px; overflow: hidden; flex-basis: 100%; margin-top: 6px; }
.filerow .bar > i { display: block; height: 100%; background: var(--grad); width: 0; transition: width .2s; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.err { background: rgba(248,113,113,.12); color: #fca5a5; border: 1px solid rgba(248,113,113,.3); border-radius: 11px; padding: 12px 15px; font-size: .92rem; margin-bottom: 18px; display: none; }
.note { color: var(--faint); font-size: .82rem; text-align: center; margin-top: 14px; }

/* success panel */
.done { text-align: center; padding: 24px 10px; }
.done .ck { width: 74px; height: 74px; margin: 0 auto 14px; border-radius: 50%; background: var(--grad-soft); border: 1px solid var(--line); display: grid; place-items: center; }
.done .ck svg { width: 38px; height: 38px; stroke: var(--ok); fill: none; stroke-width: 2.4; }
.done h2 { margin: 6px 0 8px; font-size: 1.6rem; }
.done p { color: var(--muted); }
.done .ref { display: inline-block; margin: 12px 0; font-weight: 700; color: var(--cyan); background: var(--grad-soft); border: 1px solid var(--line); padding: 8px 16px; border-radius: 11px; }

/* modal (download gate) */
.modal-bg { position: fixed; inset: 0; background: rgba(4,7,13,.72); backdrop-filter: blur(4px); z-index: 100; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal-bg.open { display: flex; }
.modal { width: 100%; max-width: 440px; background: linear-gradient(180deg, var(--panel), var(--bg-2)); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.modal h3 { margin: 0 0 6px; font-size: 1.3rem; }
.modal p.sub { color: var(--muted); margin: 0 0 20px; font-size: .95rem; }
.modal .x { float: right; color: var(--faint); cursor: pointer; font-size: 1.4rem; line-height: 1; margin: -6px -4px 0 0; }

@media (max-width: 860px) {
  .band-inner, .detail-hero { grid-template-columns: 1fr; }
  .buy-card { position: static; }
  .tiers, .two { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-links.show { display: flex; position: absolute; top: 66px; left: 0; right: 0; flex-direction: column; background: var(--bg-2); border-bottom: 1px solid var(--line); padding: 16px 22px; gap: 16px; }
}
.burger { display: none; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 9px; padding: 8px; cursor: pointer; }
.burger svg { width: 22px; height: 22px; stroke: var(--ink); fill: none; stroke-width: 2; }
@media (max-width: 860px) { .burger { display: inline-flex; } .nav-cta.desktop { display: none; } }