/* Nivra site — shared dark theme for privacy / welcome / goodbye */
:root {
  --bg: #050507;
  --fg: #f3f3f6;
  --fg-dim: rgba(255, 255, 255, .66);
  --fg-faint: rgba(255, 255, 255, .40);
  --edge: rgba(255, 255, 255, .11);
  --glass: linear-gradient(145deg, rgba(255,255,255,.075), rgba(255,255,255,.025) 50%, rgba(255,255,255,.05));
  --a1: #8b7bff;
  --a2: #4fd1ff;
  --a3: #ff7ad9;
  --amber: #ffbe50;
  --ease: cubic-bezier(.22, 1, .36, 1);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }

body {
  margin: 0;
  min-height: 100vh;
  font: 16px/1.65 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--fg);
  background: radial-gradient(120% 70% at 50% -10%, #15151c 0%, var(--bg) 60%);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* ── Ambient backdrop ─────────────────────────────────────────────────────── */
.backdrop { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.backdrop::before {            /* fine grid, fading toward the edges */
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(70% 60% at 50% 30%, #000 20%, transparent 75%);
          mask-image: radial-gradient(70% 60% at 50% 30%, #000 20%, transparent 75%);
}
.orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; will-change: transform; }
.orb.o1 { width: 520px; height: 520px; left: -140px; top: -120px; background: var(--a1); animation: drift1 26s ease-in-out infinite alternate; }
.orb.o2 { width: 460px; height: 460px; right: -120px; top: 18%;   background: var(--a2); opacity: .32; animation: drift2 32s ease-in-out infinite alternate; }
.orb.o3 { width: 420px; height: 420px; left: 30%; bottom: -200px;  background: var(--a3); opacity: .22; animation: drift3 38s ease-in-out infinite alternate; }
@keyframes drift1 { to { transform: translate(140px, 90px) scale(1.15); } }
@keyframes drift2 { to { transform: translate(-120px, 140px) scale(.9); } }
@keyframes drift3 { to { transform: translate(-160px, -80px) scale(1.2); } }

/* ── Layout ───────────────────────────────────────────────────────────────── */
.wrap { max-width: 56rem; margin: 0 auto; padding: 0 1.25rem 4rem; }

.nav {
  position: sticky; top: 14px; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  margin: 14px auto 0; max-width: 56rem;
  padding: .55rem .7rem .55rem 1rem;
  border: 1px solid var(--edge); border-radius: 999px;
  background: rgba(14, 14, 18, .62);
  -webkit-backdrop-filter: blur(18px) saturate(1.4); backdrop-filter: blur(18px) saturate(1.4);
}
.brand { display: flex; align-items: center; gap: .6rem; color: var(--fg); text-decoration: none; font-weight: 700; letter-spacing: .02em; }
.brand svg { width: 26px; height: 26px; }
.nav-links { display: flex; gap: .25rem; }
.nav-links a {
  color: var(--fg-dim); text-decoration: none; font-size: .88rem; font-weight: 500;
  padding: .4rem .85rem; border-radius: 999px; transition: background .25s var(--ease), color .25s var(--ease);
}
.nav-links a:hover { color: var(--fg); background: rgba(255,255,255,.08); }
.nav-links a[aria-current="page"] { color: var(--fg); background: rgba(255,255,255,.1); }

.nav-note { padding-right: .8rem; font-size: .88rem; font-style: italic; color: var(--fg-dim); text-align: right; }
.nav-note span {
  font-style: normal; font-weight: 600;
  background: linear-gradient(120deg, var(--a2), var(--a3)); -webkit-background-clip: text; background-clip: text; color: transparent;
}
@media (max-width: 560px) { .nav-note { font-size: .78rem; } .nav-note span { display: block; } }

/* ── Hero ─────────────────────────────────────────────────────────────────── */
.hero { text-align: center; padding: 4.5rem 0 2.5rem; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .3rem .85rem; border-radius: 999px; font-size: .78rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--fg-dim); border: 1px solid var(--edge); background: rgba(255,255,255,.04);
}
.eyebrow i { width: 7px; height: 7px; border-radius: 50%; background: var(--a2); box-shadow: 0 0 10px var(--a2); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; transform: scale(.8); } }

h1 {
  margin: 1.2rem 0 .8rem; font-size: clamp(2.3rem, 7vw, 4rem); line-height: 1.05; font-weight: 800; letter-spacing: -.03em;
  background: linear-gradient(120deg, #fff 10%, var(--a2) 45%, var(--a1) 70%, var(--a3));
  background-size: 200% auto; -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: sheen 9s linear infinite;
}
@keyframes sheen { to { background-position: 200% center; } }
.lead { max-width: 38rem; margin: 0 auto; color: var(--fg-dim); font-size: 1.1rem; }
.meta { color: var(--fg-faint); font-size: .88rem; }

/* ── Animated PDF page (light ⇄ dark) ─────────────────────────────────────── */
.stage { display: flex; justify-content: center; margin: 2.6rem 0 .5rem; perspective: 900px; }
.doc {
  position: relative; width: 210px; aspect-ratio: 210 / 270; padding: 22px 20px;
  border-radius: 10px; background: #fbfbf8; color: #202020;
  box-shadow: 0 30px 80px -20px rgba(139,123,255,.55), 0 0 0 1px rgba(255,255,255,.14);
  transform: rotateY(-14deg) rotateX(6deg); animation: floaty 7s ease-in-out infinite, flip 7s ease-in-out infinite;
}
.doc b { display: block; height: 9px; width: 60%; margin-bottom: 14px; border-radius: 3px; background: #1a1a1a; }
.doc span { display: block; height: 5px; margin-bottom: 8px; border-radius: 3px; background: #b8b8b2; }
.doc span:nth-of-type(3n) { width: 82%; } .doc span:nth-of-type(4n) { width: 68%; }
.doc em { display: block; height: 52px; margin: 14px 0; border-radius: 6px; background: linear-gradient(135deg, #ff9a56, #ff5d8f 55%, #6a5cff); }
@keyframes floaty { 50% { transform: rotateY(-8deg) rotateX(3deg) translateY(-10px); } }
@keyframes flip {            /* the page body inverts but the picture keeps its colour — Smart Dark */
  0%, 38%   { background: #fbfbf8; }
  50%, 88%  { background: #121216; }
  100%      { background: #fbfbf8; }
}
.doc b, .doc span { animation: ink 7s ease-in-out infinite; }
@keyframes ink {
  0%, 38%  { background-color: var(--c, #b8b8b2); }
  50%, 88% { background-color: #d4d4dc; }
  100%     { background-color: var(--c, #b8b8b2); }
}
.doc b { --c: #1a1a1a; }
.mode-label { text-align: center; margin-top: 1.1rem; font-size: .82rem; color: var(--fg-faint); letter-spacing: .06em; }

/* ── Cards / sections ─────────────────────────────────────────────────────── */
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); margin: 1.5rem 0; }
.card {
  position: relative; padding: 1.4rem 1.4rem 1.3rem; border-radius: 20px;
  background: var(--glass); border: 1px solid var(--edge);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.14);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  transition: transform .35s var(--ease), border-color .35s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: rgba(139,123,255,.45); }
.card h3 { margin: .5rem 0 .35rem; font-size: 1.05rem; font-weight: 650; }
.card p { margin: 0; color: var(--fg-dim); font-size: .95rem; }
.ico {
  width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; color: #fff;
  background: linear-gradient(145deg, var(--a1), var(--a2)); box-shadow: 0 8px 24px -8px var(--a1);
}
.ico svg { width: 20px; height: 20px; }

h2 { margin: 3rem 0 .4rem; font-size: 1.6rem; font-weight: 750; letter-spacing: -.02em; }
h2 .tag { vertical-align: middle; margin-left: .5rem; }
.section-sub { color: var(--fg-dim); margin: 0 0 1rem; }

.tag {
  display: inline-block; padding: .12rem .6rem; border-radius: 999px; font-size: .72rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: var(--a2); border: 1px solid rgba(79,209,255,.35); background: rgba(79,209,255,.08);
}

/* ── Steps ────────────────────────────────────────────────────────────────── */
.steps { list-style: none; margin: 1rem 0; padding: 0; counter-reset: s; display: grid; gap: .9rem; }
.steps li {
  counter-increment: s; position: relative; padding: 1.1rem 1.2rem 1.1rem 4rem; border-radius: 18px;
  background: var(--glass); border: 1px solid var(--edge); color: var(--fg-dim);
}
.steps li::before {
  content: counter(s); position: absolute; left: 1.1rem; top: 1rem; width: 2rem; height: 2rem; display: grid; place-items: center;
  border-radius: 50%; font-weight: 700; color: #fff; background: linear-gradient(145deg, var(--a1), var(--a2)); box-shadow: 0 0 18px -2px var(--a1);
}
.steps strong { color: var(--fg); }

.callout {
  display: flex; gap: .8rem; margin: 1.2rem 0; padding: 1rem 1.2rem; border-radius: 16px;
  background: rgba(255,190,80,.07); border: 1px solid rgba(255,190,80,.28); color: var(--fg-dim); font-size: .95rem;
}
.callout b { color: var(--amber); }

/* ── Table ────────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; border-radius: 18px; border: 1px solid var(--edge); background: var(--glass); }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { text-align: left; vertical-align: top; padding: .85rem 1.1rem; border-bottom: 1px solid var(--edge); }
th { color: var(--fg-faint); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; font-weight: 600; }
tr:last-child td { border-bottom: 0; }
td { color: var(--fg-dim); }

ul.ticks { list-style: none; padding: 0; margin: 1rem 0; display: grid; gap: .6rem; }
ul.ticks li { position: relative; padding: .85rem 1rem .85rem 2.8rem; border-radius: 14px; border: 1px solid var(--edge); background: rgba(255,255,255,.03); color: var(--fg-dim); }
ul.ticks li::before {
  content: ''; position: absolute; left: 1rem; top: 1.15rem; width: .9rem; height: .5rem;
  border-left: 2px solid var(--a2); border-bottom: 2px solid var(--a2); transform: rotate(-45deg);
}
ul.ticks.no li::before { width: .8rem; height: .8rem; border: 0; top: 1.05rem; background:
  linear-gradient(45deg, transparent 43%, var(--a3) 43% 57%, transparent 57%),
  linear-gradient(-45deg, transparent 43%, var(--a3) 43% 57%, transparent 57%); transform: none; }
ul.ticks strong { color: var(--fg); }

/* ── Bits ─────────────────────────────────────────────────────────────────── */
a { color: var(--a2); text-decoration: none; border-bottom: 1px solid rgba(79,209,255,.3); transition: border-color .2s; }
a:hover { border-bottom-color: var(--a2); }
.nav a, .brand, .btn { border-bottom: 0; }
code { font: .88em ui-monospace, 'Cascadia Code', Consolas, monospace; padding: .12em .45em; border-radius: 6px; background: rgba(255,255,255,.08); color: #e7e7ff; }
.btn {
  display: inline-flex; align-items: center; gap: .5rem; padding: .7rem 1.3rem; border-radius: 999px; font-weight: 600; font-size: .95rem; color: #08080b; cursor: pointer;
  background: linear-gradient(120deg, var(--a2), var(--a1)); box-shadow: 0 10px 30px -10px var(--a1); border: 0; font-family: inherit;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -10px var(--a1); }
.btn.ghost { background: rgba(255,255,255,.07); color: var(--fg); box-shadow: inset 0 0 0 1px var(--edge); }
.mini {
  font: inherit; font-size: .8rem; margin-left: .5rem; padding: .15rem .7rem; color: var(--fg); cursor: pointer;
  border: 1px solid var(--edge); border-radius: 999px; background: rgba(255,255,255,.08);
}
.mini:hover { background: rgba(255,255,255,.16); }
/* Feedback form (goodbye page) */
.fb { margin-top: 1rem; display: grid; gap: .7rem; }
.fb label { display: grid; gap: .25rem; font-size: .85rem; color: var(--fg-dim); }
.fb select, .fb textarea, .fb input {
  font: inherit; font-size: .95rem; color: var(--fg); padding: .6rem .8rem; border-radius: 10px;
  background: rgba(255,255,255,.06); border: 1px solid var(--edge); width: 100%;
}
.fb select option { background: #15151c; color: var(--fg); }
.fb textarea { min-height: 7rem; resize: vertical; }
.fb select:focus, .fb textarea:focus, .fb input:focus { outline: 2px solid var(--a1); outline-offset: 1px; }
.fb-actions { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.fb-status { font-size: .9rem; color: var(--fg-dim); margin: 0; }
.fb-status.ok { color: #7be3a5; }
.fb-status.err { color: var(--amber); }
.only-edge, .only-chrome { display: none; }
html.edge .only-edge, html.chrome .only-chrome { display: inline; }

footer { margin-top: 4rem; padding-top: 1.5rem; border-top: 1px solid var(--edge); text-align: center; color: var(--fg-faint); font-size: .85rem; }

/* ── Entrance ─────────────────────────────────────────────────────────────── */
.rise { opacity: 0; transform: translateY(18px); animation: rise .9s var(--ease) forwards; }
.rise.d1 { animation-delay: .08s; } .rise.d2 { animation-delay: .18s; } .rise.d3 { animation-delay: .3s; }
@keyframes rise { to { opacity: 1; transform: none; } }

@media (max-width: 560px) {
  .nav { margin-inline: 10px; }
  .brand span { display: none; }
  .steps li { padding-left: 3.6rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .rise { opacity: 1; transform: none; }
}