/* ===================================================================
   Motion Patterns — pkshatech.com inspired animation showcase
   Signature easing: cubic-bezier(.26, .06, 0, 1)  ← all hover/state
                     cubic-bezier(.43, .05, .17, 1) ← clip-path reveals
                     cubic-bezier(.19, 1, .22, 1)   ← expo-out hero
   =================================================================== */

:root {
  --ease-primary:  cubic-bezier(.26, .06, 0, 1);
  --ease-reveal:   cubic-bezier(.43, .05, .17, 1);
  --ease-expo:     cubic-bezier(.19, 1,   .22, 1);

  --c-bg:        #ffffff;
  --c-ink:       #0b1a3a;
  --c-ink-soft:  #4a5878;
  --c-line:      #e6e9f2;
  --c-accent:    #2f5fff;
  --c-dark:      #0a0f24;
  --c-card-bg:   #f7f8fc;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  overflow-x: clip;
  max-width: 100vw;
}
body {
  font-family: "Satoshi", -apple-system, BlinkMacSystemFont, "Hiragino Sans", system-ui, sans-serif;
  background: var(--c-bg);
  color: var(--c-ink);
  font-weight: 400;
  font-feature-settings: "ss01", "ss02";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
main { overflow-x: clip; max-width: 100vw; }

a { color: inherit; text-decoration: none; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .85em;
  background: rgba(11, 26, 58, .06);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--c-ink);
  word-break: break-word;
}

/* ===================== Intro overlay (A: logo dissipate) ===================== */
.intro {
  position: fixed; inset: 0;
  background: var(--c-bg);
  z-index: 9999;
  display: grid; place-items: center;
  pointer-events: none;
}
.intro.is-done { display: none; }
.intro__logo { width: min(60vw, 420px); }
.intro__logo svg { width: 100%; height: auto; display: block; }
.intro.is-out {
  transition: opacity .6s var(--ease-primary) .9s;
  opacity: 0;
}

/* ===================== Header ===================== */
.header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px clamp(20px, 4vw, 48px);
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-line);
}
.header__brand {
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -.02em;
  color: var(--c-ink);
  transition: opacity .3s var(--ease-primary);
}
.header__brand:hover { opacity: .6; }
.header__nav { display: flex; gap: clamp(12px, 2vw, 28px); }
.header__link {
  font-size: clamp(11px, 1vw, 13px);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-ink-soft);
  transition: color .4s var(--ease-primary);
}
.header__link:hover { color: var(--c-ink); }
@media (max-width: 640px) {
  .header__nav { gap: 10px; }
  .header__link { font-size: 10px; letter-spacing: .08em; }
}

/* ===================== Section 01: Hero (.kv) ===================== */
.kv {
  position: relative;
  min-height: 100svh;
  padding: clamp(120px, 18vh, 180px) clamp(24px, 5vw, 80px) clamp(60px, 8vh, 100px);
  display: grid;
  grid-template-rows: 1fr auto;
  overflow: hidden;
  isolation: isolate;
  background: var(--c-bg);
}

/* --- 3-lane vertical marquee (D) --- */
.kv__bg {
  position: absolute; inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: .42;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(8px, 1.5vw, 20px);
  padding: clamp(8px, 1.5vw, 20px);
  mix-blend-mode: darken;
}
.kvBg__track {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
}
.kvBg__images {
  display: flex; flex-direction: column;
  gap: clamp(8px, 1.5vw, 20px);
}
.kvBg__images span {
  display: block;
  flex: 0 0 auto;
  aspect-ratio: 4 / 5;
  background:
    radial-gradient(circle at 30% 30%, rgba(47, 95, 255, .18), transparent 62%),
    linear-gradient(135deg, #d6deef 0%, #ebeef8 60%, #fafbff 100%);
  border-radius: 4px;
}
.kvBg__images span:nth-child(odd) {
  background:
    radial-gradient(circle at 70% 70%, rgba(11, 26, 58, .22), transparent 65%),
    linear-gradient(160deg, #f0f2fa 0%, #d2d9ec 70%, #b1bbdf 100%);
}
.kvBg__images span:nth-child(3n) {
  background:
    radial-gradient(circle at 50% 30%, rgba(47, 95, 255, .35), transparent 60%),
    linear-gradient(180deg, #2f5fff 0%, #1e2a55 100%);
}

@keyframes kvLoopA {
  0%   { transform: translateY(0); }
  100% { transform: translateY(-50%); }
}
@keyframes kvLoopB {
  0%   { transform: translateY(-50%); }
  100% { transform: translateY(0); }
}
@keyframes kvLoopC {
  0%   { transform: translateY(0); }
  100% { transform: translateY(-50%); }
}
.kvBg__track--1 .kvBg__images { animation: kvLoopA  90s linear infinite; }
.kvBg__track--2 .kvBg__images { animation: kvLoopB 102s linear infinite; }
.kvBg__track--3 .kvBg__images { animation: kvLoopC 120s linear infinite; }

/* --- Floating blobs (J: float) --- */
.kv__float {
  position: absolute;
  border-radius: 50%;
  filter: blur(.6rem);
  z-index: 0;
  pointer-events: none;
  mix-blend-mode: multiply;
}
.kv__float--a {
  right: clamp(20px, 8vw, 140px);
  top: 22%;
  width: clamp(80px, 12vw, 180px);
  aspect-ratio: 1;
  background:
    radial-gradient(circle at 30% 30%, rgba(47,95,255,.75), transparent 70%),
    linear-gradient(135deg, #2f5fff, #0b1a3a);
  opacity: .32;
  animation: floatA 6s ease-in-out infinite;
}
.kv__float--b {
  left: clamp(20px, 6vw, 80px);
  bottom: 18%;
  width: clamp(60px, 9vw, 130px);
  aspect-ratio: 1;
  background:
    radial-gradient(circle at 70% 70%, rgba(11,26,58,.7), transparent 70%),
    linear-gradient(135deg, #0b1a3a, #2f5fff);
  opacity: .24;
  animation: floatB 8s ease-in-out infinite -2s;
}
@keyframes floatA {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-30px); }
}
@keyframes floatB {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(20px, -22px); }
}

.kv__content {
  position: relative;
  z-index: 1;
  display: grid;
  align-content: center;
  gap: clamp(20px, 3.2vh, 36px);
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
}

.kv__label {
  font-size: clamp(11px, 1.05vw, 13px);
  letter-spacing: .25em;
  font-weight: 500;
  color: var(--c-ink-soft);
  text-transform: uppercase;
}

/* Hero title — vw-based, headroom enforced */
.kv__title {
  font-family: "Satoshi", sans-serif;
  font-weight: 900;
  /* (100vw - padding*2) / 8chars ≈ vw factor.  8.5 keeps "PATTERNS"(8) safe */
  font-size: clamp(56px, 11.2vw, 200px);
  line-height: .92;
  letter-spacing: -.025em;
  color: var(--c-ink);
}
.kv__title span { display: block; }

.kv__lead {
  font-size: clamp(14px, 1.4vw, 19px);
  color: var(--c-ink-soft);
  max-width: 560px;
  line-height: 1.6;
}

.kv__scroll {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  letter-spacing: .25em;
  color: var(--c-ink-soft);
  text-transform: uppercase;
  margin-top: 24px;
}
.kv__scrollbar {
  flex: 0 0 80px;
  height: 1px;
  background: var(--c-line);
  overflow: hidden;
  position: relative;
}
.kv__scrollbar > div {
  width: 100%;
  height: 100%;
  background: var(--c-ink);
  transform: translateX(-100%);
  animation: scrollbarAnim 2.4s var(--ease-primary) infinite;
}
@keyframes scrollbarAnim {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ===================== Reveal patterns (L: IO + isHidden) ===================== */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity .9s ease-out,
    transform .9s var(--ease-primary);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* B+C: blur + y + opacity stagger (hero) */
[data-reveal-stagger] {
  display: block;
  opacity: 0;
  transform: translateY(60px);
  filter: blur(8px);
  transition:
    opacity 1.1s ease-out,
    transform 1.1s var(--ease-expo),
    filter 1.1s ease-out;
  will-change: opacity, transform, filter;
}
[data-reveal-stagger].is-visible {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

/* ===================== Section common ===================== */
.se, .cards, .vi, .cta {
  padding: clamp(80px, 14vh, 160px) clamp(24px, 5vw, 80px);
  position: relative;
  isolation: isolate;
}
.se__inner, .cards__inner, .vi__inner, .cta__inner {
  max-width: 1240px;
  margin: 0 auto;
}
.se__label {
  font-size: clamp(11px, 1.05vw, 13px);
  letter-spacing: .25em;
  text-transform: uppercase;
  color: var(--c-ink-soft);
  margin-bottom: clamp(16px, 2vw, 24px);
  font-weight: 500;
}
.se__label--on-dark { color: rgba(255,255,255,.7); }
.se__title, .cta__title {
  font-size: clamp(32px, 5.2vw, 72px);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -.022em;
  margin-bottom: clamp(32px, 5vw, 64px);
}

/* ===================== E: clip-path wipe ===================== */
[data-clip-wipe] {
  display: inline-block;
  clip-path: inset(0 100% 0 0);
  opacity: 0;
  transition:
    clip-path .85s var(--ease-reveal),
    -webkit-clip-path .85s var(--ease-reveal),
    opacity .9s ease-out;
  will-change: clip-path;
}
[data-clip-wipe].is-visible {
  clip-path: inset(0 0 0 0);
  opacity: 1;
}

[data-clip-wipe-image] {
  clip-path: inset(0 0 0 100%);
  transition:
    clip-path 1s var(--ease-reveal),
    -webkit-clip-path 1s var(--ease-reveal);
  will-change: clip-path;
}
[data-clip-wipe-image].is-visible {
  clip-path: inset(0 0 0 0);
}

.se__visual {
  width: min(820px, 100%);
  aspect-ratio: 16 / 9;
  margin: clamp(32px, 5vw, 64px) 0;
  overflow: hidden;
  border-radius: 4px;
}
.se__image {
  width: 100%; height: 100%;
  background:
    radial-gradient(circle at 70% 30%, rgba(47,95,255,.55), transparent 60%),
    radial-gradient(circle at 20% 80%, rgba(255,255,255,.15), transparent 50%),
    linear-gradient(135deg, #0b1a3a 0%, #1e2a55 50%, #2f5fff 100%);
}
.se__body {
  max-width: 720px;
  font-size: clamp(14px, 1.3vw, 18px);
  line-height: 1.75;
  color: var(--c-ink-soft);
}

/* ===================== F: Polygon cards ===================== */
.cards { background: var(--c-card-bg); }
.cards__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}
.card {
  background: var(--c-bg);
  padding: clamp(28px, 3.4vw, 44px);
  padding-bottom: clamp(48px, 6vw, 72px);
  position: relative;
  transition: transform .5s var(--ease-primary), filter .5s var(--ease-primary);
  min-height: 240px;
}
.card:hover { transform: translateY(-4px); }
.card--home {
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - 2rem),
    50% 100%,
    0 calc(100% - 2rem)
  );
}
.card--arrow {
  clip-path: polygon(
    0 0,
    calc(100% - 3rem) 0,
    100% 50%,
    calc(100% - 3rem) 100%,
    0 100%
  );
  padding-right: clamp(56px, 7vw, 84px);
}
.card--circle {
  border-radius: 50%;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  text-align: center;
  padding: clamp(28px, 3.4vw, 44px);
  min-height: 0;
}
.card__num {
  display: block;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--c-accent);
  margin-bottom: 12px;
  font-weight: 500;
}
.card__title {
  font-size: clamp(20px, 2.1vw, 28px);
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -.01em;
}
.card__body {
  font-size: 12px;
  line-height: 1.65;
  color: var(--c-ink-soft);
  word-break: break-word;
}
.card__body code {
  font-size: 11.5px;
  line-height: 1.5;
}
.card--circle .card__body {
  font-size: 13.5px;
  line-height: 1.6;
}

/* ===================== H: Rotating ring + flare ===================== */
.vi { background: var(--c-bg); }
.vi__visual {
  position: relative;
  width: min(540px, 78vw);
  aspect-ratio: 1;
  margin: clamp(40px, 6vw, 80px) auto;
}
.ring {
  position: absolute;
  border: 2px solid var(--c-ink);
  border-radius: 50%;
}
.ring--outer {
  inset: 0;
  border-style: dashed;
  border-width: 1.5px;
  animation:
    ringRot 32s linear infinite,
    ringOpa 8s ease-in-out infinite;
}
.ring--mid {
  inset: 14%;
  border-width: 2px;
  animation:
    ringRot 18s linear infinite reverse,
    ringOpa 5s ease-in-out infinite;
}
.ring--inner {
  inset: 32%;
  border-style: dotted;
  border-width: 2.5px;
  animation:
    ringRot 12s linear infinite,
    ringOpa 4s ease-in-out infinite;
}
@keyframes ringRot {
  0%   { transform: rotate(0); }
  100% { transform: rotate(360deg); }
}
@keyframes ringOpa {
  0%, 100% { opacity: 1; }
  25%      { opacity: .55; }
  60%      { opacity: .8; }
}

/* I: flare */
.vi__flare {
  position: absolute;
  inset: 22%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47,95,255,.55), transparent 70%);
  filter: blur(24px);
  animation: flareAnim 7s linear infinite;
  pointer-events: none;
}
@keyframes flareAnim {
  0%   { opacity: 1;  transform: translate(0, 0)        scale(1); }
  10%  { opacity: .5; transform: translate(-6%, -6%)    scale(.94); }
  50%  { opacity: .9; transform: translate(8%, 4%)      scale(1.08); }
  100% { opacity: 1;  transform: translate(0, 0)        scale(1); }
}

.vi__core {
  position: absolute;
  inset: 44%;
  border-radius: 50%;
  background: var(--c-ink);
  filter: blur(2px);
}

.vi__body {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  font-size: clamp(14px, 1.3vw, 18px);
  color: var(--c-ink-soft);
  line-height: 1.75;
}

/* ===================== K: CTA gradient loop ===================== */
.cta {
  background: linear-gradient(
    110deg,
    #0b1a3a 0%,
    #1e2a55 25%,
    #2f5fff 50%,
    #1e2a55 75%,
    #0b1a3a 100%
  );
  background-size: 300% 300%;
  animation: gradLoop 20s linear infinite;
  color: #fff;
  overflow: hidden;
}
@keyframes gradLoop {
  0%   { background-position:   0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position:   0% 50%; }
}
.cta__title { color: #fff; max-width: 900px; }
.cta__body {
  max-width: 720px;
  font-size: clamp(14px, 1.3vw, 18px);
  line-height: 1.75;
  color: rgba(255,255,255,.88);
}
.cta__body code {
  background: rgba(255,255,255,.13);
  color: #fff;
}

/* ===================== Footer ===================== */
.footer {
  padding: 56px clamp(24px, 5vw, 80px);
  text-align: center;
  background: var(--c-bg);
  border-top: 1px solid var(--c-line);
  font-size: 13px;
  color: var(--c-ink-soft);
}
.footer__small {
  margin-top: 8px;
  font-size: 11px;
  opacity: .75;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* ===================== Reduced motion ===================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}