/* ---------------------------------------------------------------
   Koas — original styles inspired by a modern AI/tech aesthetic.
   Dark theme · gradient background · sticky nav · bold hero banner.
   --------------------------------------------------------------- */

:root {
  --bg:          #07070f;
  --bg-2:        #0c0b1a;
  --text:        #e7e7f2;
  --text-dim:    #a3a2b8;
  --border:      rgba(255, 255, 255, 0.08);
  --card:        rgba(255, 255, 255, 0.03);

  /* Accent gradient — violet → indigo → cyan */
  --grad-a:      #7c5cff;
  --grad-b:      #4d7cff;
  --grad-c:      #22d3ee;

  --radius:      14px;
  --maxw:        1120px;
  --font:        "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;

  /* Scale factor for hero/main content (1.3 = 30% bigger) */
  --content-scale: 1.3;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

/* ---------- Circuit-board background ---------- */
.bg-circuit {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    radial-gradient(1100px 620px at 50% -12%, rgba(59, 130, 246, 0.22), transparent 60%),
    radial-gradient(820px 520px at 85% 18%, rgba(56, 189, 248, 0.10), transparent 60%),
    linear-gradient(180deg, #0a1226 0%, #060a17 62%);
}
.bg-circuit::before {
  content: "";
  position: absolute;
  inset: -12%;
  background-image: url("../img/circuit.svg");
  background-size: 340px 340px;
  opacity: 0.6;
  -webkit-mask-image: radial-gradient(125% 95% at 50% 0%, #000 45%, transparent 85%);
          mask-image: radial-gradient(125% 95% at 50% 0%, #000 45%, transparent 85%);
  animation: drift 44s linear infinite;
}
@keyframes drift {
  from { transform: translate(0, 0); }
  to   { transform: translate(-340px, -340px); }   /* one full tile → seamless loop */
}

@media (prefers-reduced-motion: reduce) {
  .bg-circuit::before { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.94rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
  cursor: pointer;
}
.btn--lg { padding: 0.85rem 1.5rem; font-size: 1rem; }

.btn--primary {
  color: #fff;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  box-shadow: 0 8px 24px rgba(77, 124, 255, 0.35);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(77, 124, 255, 0.45); }

.btn--ghost {
  color: var(--text);
  border-color: var(--border);
  background: var(--card);
}
.btn--ghost:hover { border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.06); }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(7, 7, 15, 0.55);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.brand { display: flex; align-items: center; gap: 0.55rem; font-weight: 800; letter-spacing: -0.02em; }
.brand__mark {
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 11px;
  background: linear-gradient(135deg, #16264f, #0a1330);
  border: 1px solid rgba(59, 130, 246, 0.35);
  box-shadow: 0 6px 18px rgba(10, 19, 48, 0.55),
              inset 0 1px 0 rgba(255, 255, 255, 0.12);
}
.brand__crown { width: 26px; height: 26px; display: block; }
.brand__name { font-size: 1.2rem; white-space: nowrap; }

.nav__links { display: flex; gap: 1.6rem; margin-left: 1rem; }
.nav__links a { color: var(--text-dim); font-weight: 500; font-size: 0.95rem; transition: color 0.15s ease; }
.nav__links a:hover { color: var(--text); }

.nav__actions { margin-left: auto; display: flex; gap: 0.6rem; align-items: center; }

/* ---------- Hero ---------- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 7rem 1.5rem 5rem;
  text-align: center;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--text-dim);
  font-size: calc(0.85rem * var(--content-scale));
  margin-bottom: 1.75rem;
}
.dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--grad-c);
  box-shadow: 0 0 12px var(--grad-c);
}
.hero__title {
  font-size: calc(clamp(2.4rem, 6vw, 4.4rem) * var(--content-scale));
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 0 auto 1.4rem;
  max-width: 14ch;
}
.grad-text {
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b) 45%, var(--grad-c));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__subtitle {
  color: var(--text-dim);
  font-size: calc(clamp(1rem, 2.2vw, 1.2rem) * var(--content-scale));
  max-width: 46ch;
  margin: 0 auto 2.4rem;
}
.hero__cta { display: flex; gap: 0.9rem; justify-content: center; flex-wrap: wrap; }
.hero__cta .btn--lg {
  font-size: calc(1rem * var(--content-scale));
  padding: calc(0.85rem * var(--content-scale)) calc(1.5rem * var(--content-scale));
}

.hero__trust {
  margin-top: 4rem;
  color: var(--text-dim);
  font-size: calc(0.85rem * var(--content-scale));
}
.hero__trust ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: flex;
  gap: 2.2rem;
  justify-content: center;
  flex-wrap: wrap;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  opacity: 0.6;
}

/* ---------- Prose / content section ---------- */
.prose {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}
.prose__title {
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
  text-align: center;
  margin: 0 0 2rem;
}
.prose p {
  color: var(--text-dim);
  font-size: 1.08rem;
  line-height: 1.8;
  margin: 0 0 1.4rem;
}
.prose p:last-child { margin-bottom: 0; }

/* ---------- Journey (idea -> reality) ---------- */
.journey {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}
.journey__head { text-align: center; margin-bottom: 3rem; }
.journey__title {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0.4rem 0 0.8rem;
}
.journey__lead { color: var(--text-dim); font-size: 1.05rem; margin: 0; }

.journey__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
.step {
  position: relative;
  padding: 1.75rem 1.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.step:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 14px 30px rgba(10, 19, 48, 0.5);
}
/* connector arrow sitting in the gap between cards */
.step:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -1.05rem;
  top: 2.3rem;
  color: var(--grad-b);
  font-size: 1.2rem;
  font-weight: 700;
}
.step__num {
  display: block;
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-c));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0.9;
}
.step__icon { display: block; font-size: 1.7rem; margin: 0.9rem 0 0.6rem; }
.step__title { font-size: 1.2rem; font-weight: 700; margin: 0 0 0.5rem; }
.step__body { color: var(--text-dim); font-size: 0.96rem; line-height: 1.65; margin: 0; }

@media (max-width: 1000px) {
  .journey__steps { grid-template-columns: repeat(2, 1fr); }
  .step:not(:last-child)::after { display: none; }
}
@media (max-width: 560px) {
  .journey__steps { grid-template-columns: 1fr; }
}

/* ---------- Closing: signup + hiring ---------- */
.closing {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
}
.closing__grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 1.5rem;
}
.panel {
  padding: 2.4rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card);
}
.panel--signup {
  background:
    radial-gradient(600px 300px at 0% 0%, rgba(59, 130, 246, 0.18), transparent 70%),
    var(--card);
  border-color: rgba(59, 130, 246, 0.3);
}
.panel__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 0.9rem;
}
.panel__title { font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; margin: 0 0 0.7rem; }
.panel__body { color: var(--text-dim); font-size: 1rem; line-height: 1.6; margin: 0 0 1.6rem; }
.panel__fine { color: var(--text-dim); font-size: 0.85rem; margin: 1rem 0 0; }
.panel__fine a { color: var(--grad-b); }
.panel__fine a:hover { text-decoration: underline; }

.signup { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.signup__input {
  flex: 1 1 220px;
  min-width: 0;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(6, 10, 23, 0.6);
  color: var(--text);
  font: inherit;
  font-size: 0.95rem;
}
.signup__input::placeholder { color: var(--text-dim); }
.signup__input:focus {
  outline: none;
  border-color: var(--grad-b);
  box-shadow: 0 0 0 3px rgba(77, 124, 255, 0.25);
}

@media (max-width: 760px) {
  .closing__grid { grid-template-columns: 1fr; }
}

/* ---------- Product features ---------- */
.features {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}
.features__head { text-align: center; margin-bottom: 3rem; }
.features__title {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0.4rem 0 0.8rem;
}
.features__lead {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin: 0 auto;
  max-width: 46ch;
}
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.feature {
  padding: 1.75rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.feature:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 14px 30px rgba(10, 19, 48, 0.5);
}
.feature__icon {
  display: grid;
  place-items: center;
  width: 46px; height: 46px;
  border-radius: 12px;
  font-size: 1.5rem;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  margin-bottom: 1rem;
}
.feature__title { font-size: 1.15rem; font-weight: 700; margin: 0 0 0.5rem; }
.feature__body { color: var(--text-dim); font-size: 0.96rem; line-height: 1.65; margin: 0; }

@media (max-width: 880px) {
  .features__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .features__grid { grid-template-columns: 1fr; }
}

/* ---------- Pricing ---------- */
.pricing {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}
.pricing__head { text-align: center; margin-bottom: 3rem; }
.pricing__title {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0.4rem 0 0.8rem;
}
.pricing__lead { color: var(--text-dim); font-size: 1.05rem; margin: 0; }

.pricing__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.1rem;
  align-items: start;
}
.tier {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.85rem 1.4rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card);
}
.tier--featured {
  border-color: rgba(59, 130, 246, 0.55);
  background:
    radial-gradient(500px 260px at 50% 0%, rgba(59, 130, 246, 0.16), transparent 70%),
    var(--card);
  box-shadow: 0 16px 40px rgba(10, 19, 48, 0.5);
}
.tier__badge {
  position: absolute;
  top: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.25rem 0.8rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  white-space: nowrap;
}
.tier__name { font-size: 1.25rem; font-weight: 700; margin: 0 0 0.35rem; }
.tier__tagline { color: var(--text-dim); font-size: 0.92rem; margin: 0 0 1.2rem; min-height: 2.6em; }
.tier__price { font-size: 2.2rem; font-weight: 800; letter-spacing: -0.03em; margin: 0 0 1.4rem; }
.tier__period { font-size: 1rem; font-weight: 500; color: var(--text-dim); }

.tier__features { list-style: none; margin: 0 0 1.8rem; padding: 0; }
.tier__features li {
  position: relative;
  padding: 0.45rem 0 0.45rem 1.75rem;
  color: var(--text-dim);
  font-size: 0.95rem;
  border-top: 1px solid var(--border);
}
.tier__features li:first-child { border-top: none; }
.tier__features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--grad-c);
  font-weight: 700;
}
.tier__cta { margin-top: auto; justify-content: center; }

@media (max-width: 1000px) {
  .pricing__grid { grid-template-columns: repeat(2, 1fr); max-width: 620px; margin: 0 auto; }
}
@media (max-width: 560px) {
  .pricing__grid { grid-template-columns: 1fr; max-width: 420px; }
  .tier__tagline { min-height: 0; }
}

/* ---------- Forms: confirmation + auth page ---------- */
.form-success {
  padding: 0.95rem 1.15rem;
  border: 1px solid rgba(59, 130, 246, 0.45);
  border-radius: 12px;
  background: rgba(59, 130, 246, 0.14);
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.5;
}
.form--stack { flex-direction: column; align-items: stretch; }
.form--stack .signup__input { flex: 1 1 auto; }
.form--stack .btn { justify-content: center; }

.auth {
  max-width: 460px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 5rem;
}

/* prose links + lists (used by docs / careers pages) */
.prose ul { color: var(--text-dim); line-height: 1.85; padding-left: 1.2rem; margin: 0 0 1.4rem; }
.prose h2 { font-size: 1.4rem; margin: 2rem 0 0.6rem; }
.prose a { color: var(--grad-b); }
.prose a:hover { text-decoration: underline; }

/* ---------- Blog ---------- */
.post-list {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
.post-card {
  display: block;
  padding: 1.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.post-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 14px 30px rgba(10, 19, 48, 0.5);
}
.post-card__date { color: var(--text-dim); font-size: 0.82rem; margin: 0 0 0.5rem; }
.post-card__title { font-size: 1.25rem; font-weight: 700; margin: 0 0 0.6rem; }
.post-card__excerpt { color: var(--text-dim); font-size: 0.95rem; line-height: 1.6; margin: 0 0 1rem; }
.post-card__more { color: var(--grad-b); font-weight: 600; font-size: 0.9rem; }

@media (max-width: 640px) {
  .post-list { grid-template-columns: 1fr; }
}

/* ---------- Single post ---------- */
.post {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}
.post__head { text-align: center; margin-bottom: 2.5rem; }
.post__title {
  font-size: clamp(1.9rem, 4.5vw, 2.9rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0.5rem 0 0.8rem;
}
.post__lead { color: var(--text-dim); font-size: 1.1rem; margin: 0; }
.post__body h2 { margin-top: 2rem; }
.post__back { margin-top: 2.5rem; text-align: center; }

/* textarea reuses the input styling */
textarea.signup__input { min-height: 130px; resize: vertical; line-height: 1.5; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 5rem;
  color: var(--text-dim);
}
.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
  display: grid;
  grid-template-columns: 1.3fr 2fr;
  gap: 2.5rem;
}
.footer__brand .brand { margin-bottom: 0.9rem; }
.footer__tag { font-size: 0.9rem; margin: 0; max-width: 32ch; }
.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.footer__col h4 {
  color: var(--text);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 0.9rem;
}
.footer__col a {
  display: block;
  color: var(--text-dim);
  font-size: 0.92rem;
  padding: 0.3rem 0;
  transition: color 0.15s ease;
}
.footer__col a:hover { color: var(--text); }
.footer__bottom {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  text-align: center;
}

@media (max-width: 720px) {
  .footer__inner { grid-template-columns: 1fr; gap: 2rem; }
}
@media (max-width: 480px) {
  .footer__cols { grid-template-columns: 1fr 1fr; }
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .nav__links { display: none; }
  .hero { padding-top: 4.5rem; }
}