/* ============================================================
   CodeNova AI — shared theme (violet, dark, Cursor-inspired)
   Brand palette derived from the CodeNova logo monogram.
   ============================================================ */
:root {
  --bg:            #08060D;   /* near-black, purple tint  */
  --bg-2:          #0E0A17;
  --surface:       #140E20;
  --surface-2:     #1A1329;
  --violet:        #7C3AED;   /* primary brand            */
  --violet-bright: #A855F7;
  --violet-light:  #B497CF;   /* accent / cursor-on-target */
  --violet-deep:   #4C1D95;
  --text:          #F4F1FA;
  --muted:         #A79FB8;
  --border:        rgba(180, 151, 207, 0.12);
  --border-strong: rgba(180, 151, 207, 0.22);
  --radius:        14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  overflow-x: hidden;
}

.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }

a { color: inherit; text-decoration: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- Brand gradient helpers ---------- */
.brand-gradient {
  background: linear-gradient(120deg, var(--violet-deep) 0%, var(--violet) 45%, var(--violet-bright) 100%);
}
.text-gradient {
  background: linear-gradient(120deg, #FFFFFF 0%, var(--violet-light) 55%, var(--violet-bright) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Ambient background glow ---------- */
.glow {
  position: absolute;
  border-radius: 999px;
  filter: blur(120px);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 22px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--violet) 0%, var(--violet-bright) 100%);
  color: #fff;
  box-shadow: 0 10px 30px -8px rgba(124, 58, 237, 0.6);
}
.btn-primary:hover { box-shadow: 0 14px 40px -8px rgba(168, 85, 247, 0.7); }
.btn-ghost {
  background: rgba(180, 151, 207, 0.06);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { background: rgba(180, 151, 207, 0.12); }
.btn-lg { font-size: 16px; padding: 15px 30px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(8, 6, 13, 0.7);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: -0.02em; }
.nav-logo img { width: 34px; height: 34px; }
.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-link {
  padding: 8px 14px;
  border-radius: 10px;
  color: var(--muted);
  font-weight: 500;
  font-size: 15px;
  transition: color .2s ease, background .2s ease;
}
.nav-link:hover, .nav-link.active { color: var(--text); background: rgba(180, 151, 207, 0.08); }
.nav-actions { display: flex; align-items: center; gap: 12px; }

.nav-toggle { display: none; background: none; border: none; color: var(--text); cursor: pointer; }

@media (max-width: 860px) {
  .nav-menu { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav.open .nav-menu {
    display: flex;
    position: absolute;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 24px;
    background: rgba(8, 6, 13, 0.97);
    border-bottom: 1px solid var(--border);
  }
  .nav .btn-download-label-full { display: none; }
}

/* ---------- Sections ---------- */
section { position: relative; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--violet-light);
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.25);
  padding: 6px 14px;
  border-radius: 999px;
}
h1, h2, h3 { letter-spacing: -0.03em; line-height: 1.1; margin: 0; }
.section-title { font-size: clamp(28px, 4vw, 44px); font-weight: 700; }
.section-sub { color: var(--muted); font-size: 18px; max-width: 620px; }

/* ---------- Cards ---------- */
.card {
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: 0 20px 50px -20px rgba(124, 58, 237, 0.35);
}

/* ---------- App window mockup ---------- */
.window {
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  background: var(--surface);
  overflow: hidden;
  box-shadow: 0 40px 100px -30px rgba(76, 29, 149, 0.55);
}
.window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border);
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.r { background: #ff5f57; } .dot.y { background: #febc2e; } .dot.g { background: #28c840; }
.window-title { margin-left: 10px; font-size: 12px; color: var(--muted); }

/* Code editor */
.code {
  display: grid;
  grid-template-columns: auto 1fr;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 13px;
  line-height: 1.7;
}
.code .lines { padding: 16px 12px; text-align: right; color: #4a4359; border-right: 1px solid var(--border); user-select: none; }
.code pre { margin: 0; padding: 16px 18px; overflow-x: auto; color: #d7d0e6; }
.tok-key { color: #c084fc; } .tok-fn { color: #93c5fd; } .tok-str { color: #86efac; } .tok-num { color: #fca874; } .tok-com { color: #6b6480; }
.cursor-blink { display: inline-block; width: 2px; background: var(--violet-bright); animation: blink 1s step-start infinite; }
@keyframes blink { 0%,49% { opacity: 1; } 50%,100% { opacity: 0; } }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  padding: 56px 0 32px;
  margin-top: 40px;
}
.footer-grid { display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; }
.footer-col h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 14px; font-weight: 600; }
.footer-col a { display: block; color: var(--muted); font-size: 15px; padding: 5px 0; transition: color .2s ease; }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  color: var(--muted);
  font-size: 14px;
}

/* Utility */
.grid { display: grid; }
.flex { display: flex; }

/* ============================================================
   RESPONSIVE — universal mobile hardening (iOS / Android)
   ============================================================ */

/* Prevent OS text inflation on orientation change */
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

/* Media never overflows its container */
img, svg, video, canvas { max-width: 100%; height: auto; }

/* Flex/grid children may shrink below their content size (kills overflow) */
.hero-split > *, .footer-grid > *, .grid > *, .nav > * { min-width: 0; }
pre, table { max-width: 100%; }

/* Bigger, comfortable tap target for the hamburger (>=44px) */
.nav-toggle { padding: 10px; margin-right: -6px; border-radius: 10px; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; }
.nav-toggle:hover { background: rgba(180, 151, 207, 0.08); }

/* ---- Tablet ---- */
@media (max-width: 860px) {
  .section-sub { font-size: 16px; }
}

/* ---- Large phone / small tablet ---- */
@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .site-footer { padding: 44px 0 28px; }
  .footer-grid { gap: 28px 32px; }
  .footer-col { min-width: 130px; }
  .btn-lg { padding: 14px 24px; font-size: 15px; }
  .footer-bottom { justify-content: flex-start; }
}

/* Inputs must be >=16px so iOS doesn't zoom the page on focus */
@media (max-width: 768px) {
  input, textarea, select { font-size: 16px; }
}

/* ---- Phones ---- */
@media (max-width: 480px) {
  .nav { height: 60px; }
  .nav-logo { font-size: 16px; }
  .nav-logo img { width: 30px; height: 30px; }
  /* Collapse the header download to an icon to guarantee it fits */
  .nav-actions .btn-primary { padding: 11px 13px; gap: 0; }
  .nav-actions .btn-primary [data-download-label] { display: none; }
  .nav.open .nav-menu { top: 60px; }
  .section-title { font-size: clamp(24px, 7vw, 32px); }
  .eyebrow { font-size: 12px; padding: 5px 12px; }
}

/* Requirements spec tables: wrap instead of scrolling off-screen */
@media (max-width: 560px) {
  .req-table { font-size: 13px; }
  .req-table th, .req-table td { padding: 9px 8px; white-space: normal; word-break: break-word; }
  .req-table td:first-child { width: 62px; }
}

/* First-run note under download buttons (unsigned-build guidance) */
.dl-note {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.55;
  color: var(--muted);
  max-width: 440px;
}