/* Senua AI — marketing site. Dark, Senuamedia family. Self-contained. */

:root {
  --bg:        #08090d;
  --bg-2:      #0c0e14;
  --surface:   #12141c;
  --surface-2: #171a24;
  --border:    #222634;
  --border-2:  #2c3242;
  --text:      #e8eaf2;
  --muted:     #98a0b4;
  --faint:     #6a7285;
  --violet:    #7c5cff;
  --violet-2:  #9d7bff;
  --cyan:      #22d3ee;
  --pink:      #e05cc8;
  --good:      #34d399;
  --radius:    16px;
  --radius-sm: 10px;
  --maxw:      1160px;
  --grad:      linear-gradient(120deg, #7c5cff 0%, #9d7bff 45%, #22d3ee 100%);
  --font: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--font); line-height: 1.65; -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--violet-2); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 780px; }
.center { text-align: center; }
.muted { color: var(--muted); }
.grad {
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.skip-link { position: absolute; left: -999px; top: 0; background: var(--violet); color: #fff; padding: 10px 16px; z-index: 200; border-radius: 0 0 8px 0; }
.skip-link:focus { left: 0; }

.eyebrow {
  text-transform: uppercase; letter-spacing: 1.6px; font-size: 12px; font-weight: 700;
  color: var(--cyan); margin: 0 0 14px;
}
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.5px; }
h2 { font-size: clamp(28px, 4vw, 40px); margin: 0 0 14px; }
.lead-muted { color: var(--muted); font-size: 18px; max-width: 680px; margin-inline: auto; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 24px; border-radius: 999px; font-weight: 650; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: transform .12s, box-shadow .15s, background .15s;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary { background: var(--grad); color: #0a0b10; box-shadow: 0 12px 34px -12px rgba(124,92,255,.75); font-weight: 750; }
.btn--ghost { background: var(--surface); color: var(--text); border-color: var(--border-2); }
.btn--ghost:hover { background: var(--surface-2); }
.btn--sm { padding: 10px 18px; font-size: 14px; }
.btn--full { width: 100%; padding: 16px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8,9,13,.82); backdrop-filter: saturate(150%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 800; font-size: 19px; letter-spacing: -.4px; }
.brand:hover { text-decoration: none; }
.brand__mark { display: inline-flex; }
.brand__ai { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav__links { display: flex; gap: 26px; margin-left: auto; }
.nav__links a { color: var(--muted); font-size: 15px; font-weight: 500; }
.nav__links a:hover { color: var(--text); text-decoration: none; }
.nav__cta { }
.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; margin-left: auto; }
.nav__toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: .2s; }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: 96px 0 84px; }
.hero__inner { position: relative; z-index: 2; max-width: 840px; }
.hero__title { font-size: clamp(40px, 6.4vw, 74px); font-weight: 820; margin: 0 0 22px; }
.hero__lead { font-size: clamp(17px, 2.1vw, 21px); color: #ccd1de; max-width: 660px; margin: 0 0 32px; }
.hero__lead strong { color: #fff; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }
.hero__badges { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 22px; padding: 0; margin: 0; }
.hero__badges li { position: relative; padding-left: 24px; color: var(--muted); font-size: 15px; font-weight: 500; }
.hero__badges li::before {
  content: "✓"; position: absolute; left: 0; top: -1px; color: var(--cyan); font-weight: 800;
}
.hero__glow {
  position: absolute; inset: -20% -10% auto auto; width: 780px; height: 640px; z-index: 1;
  background:
    radial-gradient(closest-side, rgba(124,92,255,.34), transparent 70%),
    radial-gradient(closest-side, rgba(34,211,238,.20), transparent 70%);
  background-position: 60% 0%, 90% 30%;
  background-repeat: no-repeat; filter: blur(8px); pointer-events: none;
}

/* ---------- trust strip ---------- */
.strip { border-block: 1px solid var(--border); background: var(--bg-2); }
.strip__inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 30px 24px; text-align: center; }
.strip__num { display: block; font-size: 34px; font-weight: 820; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.strip__label { color: var(--muted); font-size: 14px; }

/* ---------- sections ---------- */
.section { padding: 88px 0; }
.section--alt { background: var(--bg-2); border-block: 1px solid var(--border); }
.section-head { max-width: 720px; margin: 0 auto 48px; }

/* problem */
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 40px; text-align: left; }
.problem { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.problem h3 { margin: 0 0 8px; font-size: 19px; }
.problem p { margin: 0; color: var(--muted); }

/* cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: border-color .15s, transform .15s, background .15s; }
.card:hover { border-color: var(--violet); transform: translateY(-4px); background: var(--surface-2); }
.card__icon { font-size: 26px; margin-bottom: 14px; }
.card h3 { margin: 0 0 8px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); }

/* compare table */
.compare { max-width: 900px; margin: 0 auto; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.compare table { width: 100%; border-collapse: collapse; font-size: 15px; }
.compare th, .compare td { padding: 15px 18px; text-align: left; border-bottom: 1px solid var(--border); }
.compare thead th { background: var(--surface-2); font-size: 15px; }
.compare th.col-us { color: #fff; }
.compare th.col-us::before { content: "★ "; color: var(--cyan); }
.compare th.col-them { color: var(--muted); }
.compare td:first-child { color: var(--muted); font-weight: 600; width: 26%; }
.compare td.us { color: var(--text); font-weight: 550; }
.compare td.us::before { content: "✓ "; color: var(--cyan); font-weight: 800; }
.compare td.them { color: var(--faint); }
.compare tbody tr:last-child td { border-bottom: 0; }
.compare tbody tr:hover { background: var(--surface); }

/* use cases */
.uses { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.use { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.use h3 { margin: 0 0 8px; font-size: 17px; }
.use p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* videos */
.videos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.video { position: relative; margin: 0; aspect-ratio: 16/9; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border-2); background:
  linear-gradient(135deg, rgba(124,92,255,.18), rgba(34,211,238,.12)), var(--surface); }
.video__play { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; cursor: pointer; background: transparent; color: #fff; display: flex; flex-direction: column; align-items: flex-start; justify-content: flex-end; padding: 20px; text-align: left; }
.video__title { font-weight: 650; font-size: 16px; text-shadow: 0 1px 8px rgba(0,0,0,.6); z-index: 2; }
.video__btn { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); width: 62px; height: 62px; border-radius: 50%; background: var(--grad); color: #0a0b10; display: grid; place-items: center; font-size: 22px; padding-left: 4px; box-shadow: 0 10px 30px -8px rgba(124,92,255,.8); transition: transform .15s; }
.video__play:hover .video__btn { transform: translate(-50%,-50%) scale(1.08); }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* forms */
.form { max-width: 680px; margin: 0 auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form label { display: block; font-size: 14px; font-weight: 600; color: #cdd2df; margin-bottom: 16px; }
.form input, .form select, .form textarea {
  width: 100%; margin-top: 7px; padding: 12px 14px; font: inherit; font-size: 15px;
  color: var(--text); background: var(--bg-2); border: 1px solid var(--border-2); border-radius: var(--radius-sm);
  transition: border-color .15s, box-shadow .15s; font-weight: 400;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none; border-color: var(--violet); box-shadow: 0 0 0 3px rgba(124,92,255,.22);
}
.form textarea { resize: vertical; }
.form .req { color: var(--pink); margin-left: 2px; }
.form .check { display: flex; align-items: flex-start; gap: 10px; font-weight: 400; color: var(--muted); font-size: 14px; }
.form .check input { width: auto; margin: 3px 0 0; }
.form input.invalid, .form textarea.invalid, .form select.invalid { border-color: var(--pink); box-shadow: 0 0 0 3px rgba(224,92,200,.18); }
.form__status { margin: 16px 0 0; font-size: 14.5px; min-height: 20px; }
.form__status.ok { color: var(--good); }
.form__status.err { color: var(--pink); }

/* footer */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-2); padding: 48px 0 30px; }
.footer__inner { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; align-items: flex-start; }
.footer__brand .brand__text { font-size: 20px; font-weight: 800; }
.footer__brand p { margin: 8px 0 0; font-size: 14px; }
.footer__links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer__links a { color: var(--muted); font-size: 14.5px; }
.footer__legal { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--border); font-size: 13.5px; color: var(--faint); }
.footer__legal p { margin: 0; }
.fineprint { color: var(--faint); font-size: 13.5px; margin-top: 18px; }

/* ---------- interior page hero ---------- */
.page-hero { position: relative; overflow: hidden; padding: 84px 0 56px; border-bottom: 1px solid var(--border); }
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: clamp(34px, 5.2vw, 58px); font-weight: 820; letter-spacing: -1px; margin: 14px 0 20px; max-width: 900px; }
.page-hero__lead { font-size: clamp(17px, 2vw, 20px); color: #ccd1de; max-width: 720px; margin: 0; }
.page-hero--tight { padding: 72px 0 40px; }

/* ---------- splits ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
.split--feature { align-items: center; }
.split h2 { margin-top: 0; }
.split--form { grid-template-columns: 340px 1fr; gap: 40px; }
.inline-link { font-weight: 650; }

/* panel + ticklists */
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.ticklist { list-style: none; margin: 0; padding: 0; }
.ticklist li { position: relative; padding: 0 0 14px 30px; color: var(--muted); }
.ticklist li:last-child { padding-bottom: 0; }
.ticklist li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--cyan); font-weight: 800; }
.ticklist strong { color: var(--text); }
.ticklist--plain li { padding-left: 26px; }
.ticklist--plain li::before { content: "▹"; color: var(--violet-2); }

.callout {
  margin-top: 26px; padding: 20px 24px; border-left: 3px solid var(--violet);
  background: linear-gradient(90deg, rgba(124,92,255,.08), transparent); border-radius: 0 12px 12px 0;
  color: #d7dbe6; font-size: 17px;
}

/* ---------- principles ---------- */
.principles { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.principle { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 26px 24px; overflow: hidden; }
.principle:hover { border-color: var(--border-2); }
.principle__n { display: block; font-family: var(--font); font-size: 13px; font-weight: 800; letter-spacing: 1px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 10px; }
.principle h3 { margin: 0 0 10px; font-size: 20px; }
.principle p { margin: 0; color: var(--muted); }
.principle strong { color: #dfe3ee; }

/* ---------- cards variants ---------- */
.cards--3 { grid-template-columns: repeat(3, 1fr); }
.card--static { cursor: default; }
.card--static:hover { transform: none; border-color: var(--border); background: var(--surface); }
.card__go { display: inline-block; margin-top: 14px; color: var(--violet-2); font-size: 13.5px; font-weight: 650; }

/* ---------- liquid icon chips (Lucide, gradient stroke) ---------- */
.icon-chip {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 13px; margin-bottom: 18px;
  background: linear-gradient(140deg, rgba(124,92,255,.20), rgba(34,211,238,.10));
  border: 1px solid rgba(124,92,255,.30);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.07), 0 8px 20px -12px rgba(124,92,255,.55);
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
.icon-chip .icon { width: 23px; height: 23px; display: block; }
.card:hover .icon-chip, .industry:hover .icon-chip {
  border-color: rgba(124,92,255,.55); transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.09), 0 10px 24px -10px rgba(124,92,255,.7);
}
/* feature-list uses a slightly smaller chip inline above the heading */
.feature .icon-chip { width: 42px; height: 42px; border-radius: 12px; margin-bottom: 14px; }
.feature .icon-chip .icon { width: 21px; height: 21px; }

/* ---------- feature list (stacked) ---------- */
.feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.feature h3 { margin: 0 0 10px; font-size: 19px; }
.feature p { margin: 0; color: var(--muted); }

/* ---------- industries ---------- */
.industries { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.industry { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: border-color .15s, transform .15s; }
.industry:hover { border-color: var(--violet); transform: translateY(-3px); }
.industry__icon { font-size: 28px; margin-bottom: 12px; }
.industry h3 { margin: 0 0 6px; font-size: 20px; }
.industry__tag { margin: 0 0 12px; font-size: 12.5px; font-weight: 650; letter-spacing: .3px; color: var(--cyan); text-transform: uppercase; }
.industry p:last-child { margin: 0; color: var(--muted); }

/* ---------- faq ---------- */
.faq { margin-top: 20px; }
.faq__item { padding: 22px 0; border-top: 1px solid var(--border); }
.faq__item:last-child { border-bottom: 1px solid var(--border); }
.faq__item h3 { margin: 0 0 8px; font-size: 18px; }
.faq__item p { margin: 0; color: var(--muted); }

/* ---------- cta band ---------- */
.cta-band { padding: 84px 0; text-align: center; border-top: 1px solid var(--border);
  background:
    radial-gradient(700px 320px at 50% 0%, rgba(124,92,255,.18), transparent 62%),
    radial-gradient(500px 300px at 50% 100%, rgba(34,211,238,.10), transparent 60%),
    var(--bg-2); }
.cta-band h2 { font-size: clamp(28px, 4vw, 40px); }
.cta-band .lead-muted { margin-inline: auto; }

/* ---------- form aside ---------- */
.section--tight { padding: 56px 0 84px; }
.form-aside h3 { margin: 0 0 16px; font-size: 20px; }
.form-aside .ticklist li { color: #cdd2df; }
.contact-line { display: flex; gap: 14px; margin: 0 0 14px; color: var(--text); }
.contact-line span { color: var(--faint); min-width: 74px; font-size: 13px; text-transform: uppercase; letter-spacing: .5px; padding-top: 2px; }
.aside-links { display: flex; flex-direction: column; gap: 10px; margin-top: 24px; }

/* investor disclaimer */
.disclaimer { max-width: 900px; margin: 40px auto 0; padding: 20px 22px; font-size: 12.5px; line-height: 1.6;
  color: var(--faint); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.disclaimer strong { color: var(--muted); }

/* ---------- footer columns ---------- */
.footcols { display: flex; gap: 60px; flex-wrap: wrap; }
.footcol h4 { margin: 0 0 14px; font-size: 13px; letter-spacing: .6px; text-transform: uppercase; color: var(--faint); }
.footcol a { display: block; color: var(--muted); font-size: 14.5px; padding: 5px 0; }
.footcol a:hover { color: var(--text); text-decoration: none; }
.footer__brand { max-width: 300px; }
.footer__brand .btn { margin-top: 16px; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .nav__links, .nav__cta { display: none; }
  .nav__toggle { display: flex; }
  body.menu-open .nav__links {
    display: flex; position: fixed; inset: 68px 0 auto 0; flex-direction: column; gap: 0;
    background: var(--bg-2); border-bottom: 1px solid var(--border); padding: 12px 24px 20px; z-index: 99;
  }
  body.menu-open .nav__links a { padding: 12px 0; border-bottom: 1px solid var(--border); }
  body.menu-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  body.menu-open .nav__toggle span:nth-child(2) { opacity: 0; }
  body.menu-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .problem-grid, .cards, .cards--3, .uses, .videos, .principles, .industries, .feature-list { grid-template-columns: repeat(2, 1fr); }
  .strip__inner { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .split, .split--feature, .split--form { grid-template-columns: 1fr; gap: 30px; }
  .footcols { gap: 40px; }
}
@media (max-width: 620px) {
  .hero { padding: 64px 0 56px; }
  .section { padding: 64px 0; }
  .problem-grid, .cards, .cards--3, .uses, .videos, .principles, .industries, .feature-list, .form__row { grid-template-columns: 1fr; }
  .btn { width: 100%; }
  .hero__cta { flex-direction: column; }
  .compare { font-size: 13.5px; overflow-x: auto; }
}