/* ────────────────────────────────────────────────────────────
   Kusanya marketing site — Kitabu design language
   Calm · editorial · financially transparent
   ──────────────────────────────────────────────────────────── */

/* Fonts (OFL-licensed, self-hosted) */
@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("assets/fonts/PlusJakartaSans-Regular.ttf") format("truetype");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("assets/fonts/PlusJakartaSans-Medium.ttf") format("truetype");
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("assets/fonts/PlusJakartaSans-SemiBold.ttf") format("truetype");
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("assets/fonts/PlusJakartaSans-Bold.ttf") format("truetype");
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("assets/fonts/PlusJakartaSans-ExtraBold.ttf") format("truetype");
  font-weight: 800; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("assets/fonts/Newsreader-Medium.ttf") format("truetype");
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("assets/fonts/Newsreader-MediumItalic.ttf") format("truetype");
  font-weight: 500; font-style: italic; font-display: swap;
}

/* Design tokens */
:root {
  --grape: #451254;
  --grape-deep: #321A3B;
  --papaya: #FF6B5E;
  --iris: #7447F5;
  --fog: #F6F3FA;
  --carbon: #19151D;
  --lilac: #D8CCFF;
  --rose: #FFE3E0;
  --muted: #5D5566;
  --muted-light: #B9AFC4;
  --line: #E4DCEC;
  --line-dark: rgba(255, 255, 255, 0.14);
  --white: #FFFFFF;

  --font-sans: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --font-serif: "Newsreader", Georgia, serif;

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --space-xxl: 6rem;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-signature: 36px;

  --max: 1120px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--carbon);
  background: var(--fog);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--grape); color: var(--white);
  padding: var(--space-xs) var(--space-md); z-index: 100;
}
.skip-link:focus { left: 0; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px;
  padding: 0.7rem 1.6rem;
  border-radius: 999px;
  font-weight: 700; font-size: 0.95rem;
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 160ms ease, background-color 160ms ease,
              border-color 160ms ease, color 160ms ease;
}
.btn:active { transform: scale(0.98); }
.btn-sm { min-height: 40px; padding: 0.45rem 1.1rem; font-size: 0.875rem; }
.btn-lg { min-height: 54px; padding: 0.9rem 2rem; font-size: 1rem; }
.btn-primary { background: var(--grape); color: var(--white); }
.btn-primary:hover { background: var(--grape-deep); }
.btn-papaya { background: var(--papaya); color: var(--carbon); }
.btn-papaya:hover { background: #ff8177; }
.btn-ghost { background: transparent; color: var(--grape); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--grape); }
.btn-outline-light { background: transparent; color: var(--white); border-color: var(--line-dark); }
.btn-outline-light:hover { border-color: var(--white); }
.btn:focus-visible, a:focus-visible, button:focus-visible {
  outline: 3px solid var(--iris); outline-offset: 2px;
}

/* ── Navigation ──────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(246, 243, 250, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; align-items: center; gap: var(--space-lg);
  padding: 0.9rem var(--space-lg);
}
.brand {
  display: inline-flex; align-items: center; gap: 0.55rem;
  text-decoration: none; color: var(--grape);
}
.brand-mark { width: 30px; height: 30px; }
.brand-word { font-weight: 800; font-size: 1.25rem; letter-spacing: -0.01em; }
.nav-links { display: flex; gap: var(--space-lg); margin-left: auto; }
.nav-links a {
  text-decoration: none; font-weight: 600; font-size: 0.92rem;
  color: var(--muted);
}
.nav-links a:hover { color: var(--carbon); }
.nav-actions { display: flex; gap: var(--space-xs); }
.nav-toggle {
  display: none;
  flex-direction: column; justify-content: center; gap: 6px;
  width: 48px; height: 48px; padding: 12px;
  background: none; border: none; cursor: pointer;
}
.nav-toggle span {
  display: block; height: 2px; width: 100%;
  background: var(--carbon); border-radius: 2px;
}
.mobile-menu[hidden] { display: none; }
.mobile-menu {
  display: flex; flex-direction: column; gap: var(--space-md);
  padding: var(--space-md) var(--space-lg) var(--space-lg);
  border-bottom: 1px solid var(--line);
  background: var(--fog);
}
.mobile-menu a { text-decoration: none; font-weight: 600; }

/* ── Hero (live 3D) ──────────────────────────────────────── */
.hero-3d {
  position: relative;
  min-height: 92vh;
  min-height: 92svh;
  display: flex;
  align-items: center;
  background: var(--carbon);
  color: var(--white);
  border-bottom-left-radius: var(--radius-signature);
  border-bottom-right-radius: var(--radius-signature);
  overflow: hidden;
}
#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.hero-scrim {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    rgba(25, 21, 29, 0.88) 0%,
    rgba(25, 21, 29, 0.55) 42%,
    rgba(25, 21, 29, 0.04) 72%
  );
}
.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--max); margin: 0 auto;
  padding: var(--space-xxl) var(--space-lg) var(--space-xl);
  pointer-events: none;
}
.hero-inner a, .hero-inner button { pointer-events: auto; }
.hero-copy { max-width: 620px; }
.eyebrow {
  font-size: 0.8rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--iris);
  margin-bottom: var(--space-md);
}
.hero .eyebrow, .hero-3d .eyebrow { color: var(--lilac); }
h1, h2 {
  font-weight: 800; line-height: 1.08;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(2.6rem, 5.4vw, 4.2rem); margin-bottom: var(--space-md); }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); }
h1 em, h2 em {
  font-family: var(--font-serif); font-style: italic; font-weight: 500;
  letter-spacing: 0;
}
.lede {
  font-size: 1.15rem; line-height: 1.65;
  color: var(--lilac);
  max-width: 34rem;
  margin-bottom: var(--space-lg);
}
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.hero-facts {
  display: flex; gap: var(--space-xl);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--line-dark);
}
.hero-facts dt {
  font-size: 1.5rem; font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.hero-facts dd { font-size: 0.85rem; color: var(--muted-light); max-width: 11rem; }

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: var(--space-lg);
  transform: translateX(-50%);
  z-index: 3;
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
}
.scroll-cue-line {
  width: 2px; height: 34px;
  background: var(--lilac);
  border-radius: 2px;
  transform-origin: top;
  animation: cue-drop 1.8s ease-in-out infinite;
}
@keyframes cue-drop {
  0% { transform: scaleY(0); opacity: 0; }
  35% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1) translateY(10px); opacity: 0; }
}

.device {
  background: var(--carbon);
  border-radius: 40px;
  padding: 12px;
  box-shadow: 0 32px 64px -24px rgba(25, 21, 29, 0.45);
}
.device img { border-radius: 30px; }

/* ── Product showcase ────────────────────────────────────── */
.showcase { margin-top: var(--space-xxl); text-align: center; }
.showcase .tilt, .showcase .device { max-width: 300px; margin-left: auto; margin-right: auto; }
.showcase-caption {
  margin-top: var(--space-md);
  font-size: 0.9rem; color: var(--muted);
}

/* ── Trust strip ─────────────────────────────────────────── */
.strip {
  background: var(--fog);
  border-bottom: 1px solid var(--line);
}
.strip-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: var(--space-sm) var(--space-md);
  padding: var(--space-md) var(--space-lg);
  font-size: 0.85rem; font-weight: 600; color: var(--muted);
}

/* ── Sections ────────────────────────────────────────────── */
.section { padding: var(--space-xxl) var(--space-lg); }
.section > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.section-head { margin-bottom: var(--space-xl); max-width: 46rem; }
.section-sub { color: var(--muted); margin-top: var(--space-md); font-size: 1.1rem; }
.section-tint { background: var(--white); }
.section-dark {
  background: var(--carbon); color: var(--white);
  border-radius: var(--radius-signature);
  margin: 0 var(--space-md);
}
.section-dark .section-sub { color: var(--muted-light); }
.eyebrow-light { color: var(--lilac); }

/* ── Steps ───────────────────────────────────────────────── */
.steps {
  list-style: none;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}
.step { border-top: 2px solid var(--carbon); padding-top: var(--space-md); }
.step-num {
  display: block;
  font-family: var(--font-serif); font-style: italic;
  font-size: 2.4rem; color: var(--iris);
  margin-bottom: var(--space-sm);
}
.step h3 { font-size: 1.2rem; margin-bottom: var(--space-xs); }
.step p { color: var(--muted); font-size: 0.98rem; }

/* ── Promise ─────────────────────────────────────────────── */
.promise { text-align: center; }
.promise .section-head { margin-left: auto; margin-right: auto; }
.promise-quote {
  max-width: 46rem; margin: 0 auto;
  font-family: var(--font-serif); font-style: italic; font-weight: 500;
  font-size: clamp(1.35rem, 2.5vw, 1.85rem); line-height: 1.45;
  color: var(--grape);
}
.promise-fact {
  max-width: 38rem; margin: var(--space-lg) auto 0;
  font-size: 1.05rem; color: var(--muted);
}
.promise-fact strong { color: var(--carbon); }

/* ── Features ────────────────────────────────────────────── */
.features {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl) var(--space-xxl);
}
.feature h3 { font-size: 1.25rem; margin-bottom: var(--space-xs); }
.feature h3::before {
  content: "";
  display: block; width: 28px; height: 4px;
  background: var(--papaya); border-radius: 2px;
  margin-bottom: var(--space-sm);
}
.feature p { color: var(--muted); }

/* ── Pricing ─────────────────────────────────────────────── */
.price-cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-lg);
}
.price-card {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}
.price-card h3 {
  font-size: 0.85rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted-light);
  margin-bottom: var(--space-md);
}
.price-num {
  font-size: 2.6rem; font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}
.price-num small { font-size: 1.1rem; font-weight: 700; letter-spacing: 0; }
.price-note { font-size: 0.92rem; color: var(--muted-light); }

/* ── Trust ───────────────────────────────────────────────── */
.trust-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl) var(--space-xxl);
  margin-bottom: var(--space-xxl);
}
.trust-item h3 { font-size: 1.2rem; margin-bottom: var(--space-xs); }
.trust-item p { color: var(--muted); }
.trust-app {
  display: grid; grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-xxl); align-items: center;
  border-top: 1px solid var(--line);
  padding-top: var(--space-xxl);
}
.device-wide { max-width: 280px; }
.trust-app-copy h3 { font-size: 1.5rem; margin-bottom: var(--space-sm); }
.trust-app-copy > p { color: var(--muted); margin-bottom: var(--space-lg); }
.lang-list { list-style: none; display: flex; flex-direction: column; gap: var(--space-sm); }
.lang-list li {
  display: flex; align-items: baseline; gap: var(--space-md);
  border-bottom: 1px solid var(--line);
  padding-bottom: var(--space-sm);
}
.lang-list strong { min-width: 6rem; }
.lang-list span { color: var(--muted); font-family: var(--font-serif); font-style: italic; }

/* ── CTA ─────────────────────────────────────────────────── */
.section-cta {
  background: var(--grape);
  color: var(--white);
  border-radius: var(--radius-signature);
  margin: 0 var(--space-md) var(--space-xl);
  text-align: center;
}
.cta-inner { max-width: 40rem; margin: 0 auto; }
.cta-mark { width: 44px; height: 44px; color: var(--lilac); margin: 0 auto var(--space-md); }
.section-cta h2 { margin-bottom: var(--space-md); }
.section-cta p { color: var(--lilac); margin-bottom: var(--space-lg); }
.section-cta .hero-cta { justify-content: center; }

/* ── Pilot form ──────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}
.pilot-form {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}
.pilot-form input {
  min-height: 54px;
  min-width: min(320px, 100%);
  padding: 0.9rem 1.4rem;
  border-radius: 999px;
  border: 1.5px solid var(--line-dark);
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  font: inherit;
}
.pilot-form input::placeholder { color: var(--muted-light); }
.pilot-form input:focus-visible {
  outline: 3px solid var(--iris);
  outline-offset: 2px;
  border-color: var(--lilac);
}
.pilot-note {
  min-height: 1.4em;
  font-size: 0.92rem;
  margin-bottom: var(--space-sm);
}
.pilot-note[data-state="sending"] { color: var(--muted-light); }
.pilot-note[data-state="success"] { color: var(--lilac); font-weight: 600; }
.pilot-note[data-state="error"] { color: var(--rose); font-weight: 600; }
.pilot-fallback { font-size: 0.88rem; color: var(--muted-light); }
.pilot-fallback a { color: var(--lilac); }

/* ── Footer ──────────────────────────────────────────────── */
.footer { background: var(--carbon); color: var(--muted-light); }
.footer-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; flex-wrap: wrap; justify-content: space-between;
  gap: var(--space-lg);
  padding: var(--space-xl) var(--space-lg);
}
.footer .brand { color: var(--white); }
.footer-brand p { margin-top: var(--space-xs); font-size: 0.9rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: center; }
.footer-links a { text-decoration: none; font-size: 0.9rem; font-weight: 600; }
.footer-links a:hover { color: var(--white); }
.footer-legal {
  max-width: var(--max); margin: 0 auto;
  border-top: 1px solid var(--line-dark);
  padding: var(--space-md) var(--space-lg) var(--space-xl);
  font-size: 0.78rem;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-sm);
}
.footer-legal p { max-width: 46rem; }

/* ── Motion: tilt ────────────────────────────────────────── */
.tilt {
  transition: transform 260ms ease-out;
  transform-style: preserve-3d;
  will-change: transform;
}

/* ── Motion ──────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(18px); }
.reveal.is-visible {
  opacity: 1; transform: none;
  transition: opacity 500ms ease, transform 500ms ease;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .reveal.is-visible { transition: none; }
  .btn, .tilt { transition: none; }
  .scroll-cue-line { animation: none; }
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-inner { padding-top: var(--space-xl); }
  .steps, .features, .trust-grid, .price-cards { grid-template-columns: 1fr; }
  .trust-app { grid-template-columns: 1fr; }
  .device-wide { margin: 0 auto; }
}
@media (max-width: 640px) {
  .nav-links, .nav-actions { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }
  .hero-facts { flex-direction: column; gap: var(--space-md); }
  .hero-scrim {
    background: rgba(25, 21, 29, 0.48);
  }
  .section-dark, .section-cta { margin: 0 var(--space-sm) var(--space-lg); border-radius: var(--radius-md); }
  .section { padding: var(--space-xl) var(--space-md); }
}