/* =================================================================
   TOKENS
   ================================================================= */
:root {
  --bg: #f6f7f5;
  --bg-grid: #eceef0;
  --surface: #ffffff;
  --ink: #1b1f3b;
  --ink-soft: #565b7a;
  --line: #e3e5e1;
  --accent: #3d5afe;
  --accent-ink: #0e1a8f;
  --highlight: #ffc857;
  --teal: #0f9d94;

  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", monospace;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 28px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 220ms;
  --dur-med: 480ms;
  --dur-slow: 760ms;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  background-image: linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 40px 40px;
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

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

img,
svg {
  display: block;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.icon {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* =================================================================
   LAYOUT SHELL
   ================================================================= */
.shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
  background: rgba(246, 247, 245, 0.78);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand__mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--accent);
  display: grid;
  place-items: center;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink-soft);
  transition: color var(--dur-fast) var(--ease);
}

.back-link:hover {
  color: var(--accent);
}

.back-link .icon {
  width: 18px;
  height: 18px;
  transition: transform var(--dur-fast) var(--ease);
}

.back-link:hover .icon {
  transform: translateX(-3px);
}

/* =================================================================
   REVEAL ANIMATION (scroll-triggered, satu per satu)
   ================================================================= */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease),
    transform var(--dur-slow) var(--ease);
  will-change: opacity, transform;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =================================================================
   HERO
   ================================================================= */
.hero {
  padding: 96px 0 64px;
  text-align: center;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
  background: rgba(15, 157, 148, 0.1);
  border: 1px solid rgba(15, 157, 148, 0.25);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 28px;
}

.hero__eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 auto 22px;
  max-width: 18ch;
}

.hero h1 .mark {
  position: relative;
  white-space: nowrap;
}

.hero h1 .mark::after {
  content: "";
  position: absolute;
  left: -2px;
  right: -2px;
  bottom: 0.06em;
  height: 0.34em;
  background: var(--highlight);
  z-index: -1;
  border-radius: 3px;
  transform: scaleX(0);
  transform-origin: left;
  animation: mark-in 620ms var(--ease) 520ms forwards;
}

@keyframes mark-in {
  to {
    transform: scaleX(1);
  }
}

.hero p {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px -10px rgba(61, 90, 254, 0.55);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -10px rgba(61, 90, 254, 0.6);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn--ghost:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
}

/* stat strip under hero */
.stat-strip {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  padding: 8px 0 8px;
}

.stat {
  text-align: center;
}

.stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--accent-ink);
}

.stat span {
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* =================================================================
   MODULE SECTION
   ================================================================= */
.section {
  padding: 72px 0 100px;
}

.section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.section__head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}

.section__head p {
  color: var(--ink-soft);
  margin: 0;
  max-width: 46ch;
}

.module-search {
  position: relative;
  max-width: 420px;
  margin: 0 0 28px;
}

.module-search .icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--ink-soft);
  pointer-events: none;
}

.module-search input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--ink);
  transition: border-color var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease);
}

.module-search input::placeholder {
  color: var(--ink-soft);
}

.module-search input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(61, 90, 254, 0.15);
}

.module-empty {
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.92rem;
  padding: 36px 0;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 18px;
  transition: opacity 200ms var(--ease);
}

.module-grid.is-filtering {
  opacity: 0;
}

.module-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 190px;
  transition: transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.module-card:not(.is-soon):hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 32px -18px rgba(27, 31, 59, 0.22);
  border-color: transparent;
}

.module-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(61, 90, 254, 0.09);
  color: var(--accent-ink);
}

.module-card__tag {
  position: absolute;
  top: 22px;
  right: 22px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.module-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0;
  letter-spacing: -0.01em;
}

.module-card p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.55;
  margin: 0;
  flex-grow: 1;
}

.module-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--accent-ink);
}

.module-card__cta .icon {
  width: 16px;
  height: 16px;
  transition: transform var(--dur-fast) var(--ease);
}

.module-card:not(.is-soon):hover .module-card__cta .icon {
  transform: translateX(4px);
}

.module-card.is-soon {
  cursor: default;
  opacity: 0.6;
}

.module-card.is-soon .module-card__cta {
  color: var(--ink-soft);
}

/* =================================================================
   FOOTER
   ================================================================= */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-tagline {
  margin: 0;
}

.footer-credit {
  margin: 0;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.footer-credit strong {
  color: var(--ink);
}

.footer-credit a {
  color: var(--accent-ink);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: rgba(61, 90, 254, 0.35);
  text-underline-offset: 2px;
  transition: text-decoration-color var(--dur-fast) var(--ease);
}

.footer-credit a:hover {
  text-decoration-color: var(--accent-ink);
}

/* =================================================================
   RESPONSIVE
   ================================================================= */
@media (max-width: 560px) {
  .hero {
    padding: 64px 0 44px;
  }
  .stat-strip {
    gap: 28px;
  }
  .section {
    padding: 56px 0 72px;
  }
}