/* Langkah Studio
   Palette: cool chalk paper, ink, ultramarine for what we build, turmeric for the product itself. */
:root {
  --kapur: #F1F3F8;      /* page background */
  --kertas: #FFFFFF;     /* raised surfaces */
  --tinta: #14182B;      /* text, dark sections */
  --abu: #5F667D;        /* secondary text */
  --garis: #D7DBE6;      /* hairlines */
  --ultra: #3446F0;      /* primary, the terraces */
  --ultra-soft: #DFE3FF;
  --kunyit: #F2B33D;     /* the product, highlights */

  --display: 'Bricolage Grotesque', 'Instrument Sans', system-ui, sans-serif;
  --body: 'Instrument Sans', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;

  --gutter: clamp(16px, 4vw, 48px);
  --max: 1200px;
  --radius: 14px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--kapur);
  color: var(--tinta);
  font: 400 1.0625rem/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--display); font-weight: 700; letter-spacing: -0.02em; margin: 0; }
h2 { font-size: clamp(1.9rem, 4vw, 3rem); line-height: 1.05; }
h3 { font-size: 1.25rem; line-height: 1.25; }
p { margin: 0; }
.mono { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.04em; text-transform: uppercase; }

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

.skip { position: absolute; left: -999px; top: 8px; z-index: 50; background: var(--tinta); color: #fff; padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 8px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
section { padding: clamp(72px, 10vw, 128px) 0; }
.section-sub { color: var(--abu); margin-top: 14px; max-width: 46ch; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px var(--gutter);
  background: color-mix(in srgb, var(--kapur) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid color-mix(in srgb, var(--garis) 70%, transparent);
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--display); font-weight: 500; font-size: 1.15rem; letter-spacing: -0.01em; }
.brand b { font-weight: 800; margin-left: 2px; }
.brand-mark { width: 28px; height: 28px; fill: var(--ultra); }
.nav nav { display: flex; align-items: center; gap: clamp(12px, 2.5vw, 28px); font-size: 0.95rem; }
.nav nav a { text-decoration: none; }
.nav nav a:not(.nav-cta):hover { color: var(--ultra); }
.nav-cta { background: var(--tinta); color: #fff; padding: 8px 16px; border-radius: 999px; }
.nav-cta:hover { background: var(--ultra); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 22px; border-radius: 999px;
  font: 600 1rem var(--body); text-decoration: none; cursor: pointer;
  border: 1.5px solid var(--tinta); transition: transform .2s, background .2s, color .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-solid { background: var(--ultra); border-color: var(--ultra); color: #fff; }
.btn-solid:hover { background: var(--tinta); border-color: var(--tinta); }
.btn-line { background: transparent; color: var(--tinta); }
.btn-line:hover { background: var(--tinta); color: #fff; }

/* ---------- hero ---------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: center; gap: clamp(16px, 3vw, 40px);
  max-width: 1400px; margin: 0 auto;
  min-height: calc(100svh - 64px);
  padding: clamp(32px, 5vw, 64px) var(--gutter);
}
.eyebrow { color: var(--ultra); margin-bottom: 22px; }
.hero h1 { font-size: clamp(2.7rem, 6.4vw, 5.6rem); line-height: 0.95; letter-spacing: -0.035em; font-weight: 800; }
.hero h1 em { font-style: normal; color: var(--ultra); display: block; }
.lede { margin-top: 26px; font-size: 1.15rem; color: var(--abu); max-width: 42ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.stage {
  position: relative; height: min(78svh, 680px); min-height: 420px;
  border-radius: 24px; overflow: hidden;
  background:
    repeating-linear-gradient(0deg, transparent 0 39px, color-mix(in srgb, var(--ultra) 9%, transparent) 39px 40px),
    repeating-linear-gradient(90deg, transparent 0 39px, color-mix(in srgb, var(--ultra) 9%, transparent) 39px 40px),
    var(--kertas);
  border: 1px solid var(--garis);
  touch-action: pan-y;
}
.stage-canvas { position: absolute; inset: 0; width: 100%; height: 100%; cursor: grab; opacity: 0; transition: opacity .8s; }
.stage.is-ready .stage-canvas { opacity: 1; }
.stage.is-dragging .stage-canvas { cursor: grabbing; }
.stage-fallback { position: absolute; inset: 0; display: grid; place-items: center; padding: 15%; }
.stage-fallback path { fill: var(--ultra); opacity: .85; }
.stage.is-ready .stage-fallback { display: none; }

.stage-card {
  position: absolute; left: 18px; top: 18px; width: min(300px, calc(100% - 36px));
  background: color-mix(in srgb, var(--kertas) 88%, transparent); backdrop-filter: blur(8px);
  border: 1px solid var(--garis); border-radius: var(--radius); padding: 14px 16px;
  box-shadow: 0 10px 30px -18px rgba(20, 24, 43, .35);
}
.stage-count { color: var(--ultra); }
.stage-title { font-family: var(--display); font-weight: 700; font-size: 1.35rem; letter-spacing: -0.02em; margin-top: 4px; }
.stage-text { font-size: 0.92rem; color: var(--abu); margin-top: 4px; line-height: 1.45; }

.stage-steps { position: absolute; left: 18px; right: 18px; bottom: 44px; display: flex; flex-wrap: wrap; gap: 6px; }
.stage-steps button {
  font: 500 0.85rem var(--body); color: var(--tinta); cursor: pointer;
  background: var(--kertas); border: 1px solid var(--garis); border-radius: 999px; padding: 7px 12px;
  transition: background .2s, color .2s, border-color .2s;
}
.stage-steps button .mono { font-size: 0.68rem; color: var(--abu); margin-right: 4px; }
.stage-steps button:hover { border-color: var(--ultra); }
.stage-steps button[aria-pressed="true"] { background: var(--tinta); color: #fff; border-color: var(--tinta); }
.stage-steps button[aria-pressed="true"] .mono { color: var(--kunyit); }

.stage-hud { position: absolute; left: 18px; right: 18px; bottom: 14px; display: flex; justify-content: space-between; gap: 12px; font-size: 0.66rem; color: var(--abu); text-transform: none; }

/* ---------- why ---------- */
.why { background: var(--tinta); color: #E6E8F2; }
.why-grid { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 40px; }
.why h2 { color: #fff; }
.why-body p + p { margin-top: 18px; }
.why-body { color: #B9BED2; max-width: 62ch; }
.why-lead { font-family: var(--display); font-size: clamp(1.5rem, 2.6vw, 2.1rem); line-height: 1.2; color: #fff; letter-spacing: -0.02em; }
.why .signoff { color: var(--kunyit); margin-top: 28px; }

/* ---------- principles ---------- */
.principle-list { list-style: none; padding: 0; margin: 48px 0 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--garis); }
.principle-list li { padding: 28px 28px 32px 0; border-bottom: 1px solid var(--garis); }
.principle-list li:nth-child(odd) { border-right: 1px solid var(--garis); }
.principle-list li:nth-child(even) { padding-left: 28px; }
.principle-list p { color: var(--abu); margin-top: 10px; }

/* ---------- services ---------- */
.services { padding-top: 0; }
.service-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 40px; }
.service { background: var(--kertas); border: 1px solid var(--garis); border-radius: var(--radius); padding: 28px; }
.service-wide { grid-column: 1 / -1; }
.service h3 { font-size: 1.6rem; margin-top: 18px; }
.service p:last-child { color: var(--abu); margin-top: 8px; max-width: 60ch; }
.service-scale { display: flex; align-items: center; gap: 10px; color: var(--abu); }
/* four treads, filled up to the effort it usually takes */
.bars { display: inline-flex; align-items: flex-end; gap: 2px; height: 16px; }
.bars i { width: 5px; background: var(--garis); border-radius: 1px; }
.bars i:nth-child(1) { height: 25%; } .bars i:nth-child(2) { height: 50%; }
.bars i:nth-child(3) { height: 75%; } .bars i:nth-child(4) { height: 100%; }
.bars[data-n="1"] i:nth-child(-n+1), .bars[data-n="2"] i:nth-child(-n+2), .bars[data-n="4"] i { background: var(--ultra); }

/* ---------- work ---------- */
.work { background: var(--kertas); border-block: 1px solid var(--garis); }
.project { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: center; margin-top: clamp(48px, 7vw, 88px); }
.project-flip .project-visual { order: 2; }
.project-visual {
  aspect-ratio: 4 / 3; border-radius: 20px; display: grid; place-items: center; padding: 24px;
  background: var(--tint-bg);
}
.project-kind { color: var(--tint); }
.project h3 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin-top: 10px; }
.project-copy > p:not(.project-kind) { color: var(--abu); margin-top: 14px; max-width: 52ch; }
.project-copy > p.badge-soon { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--tint); color: var(--tint); }
.project-copy > p.badge-soon::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--kunyit); }
.link { display: inline-block; margin-top: 18px; font-weight: 600; color: var(--tint); text-underline-offset: 4px; }

.tone-arusku { --tint: #0F7B5A; --tint-bg: #DDF1E8; }
.tone-umkm { --tint: #0B8466; --tint-bg: #D8F3EA; }
.tone-pulau { --tint: #2B6FD6; --tint-bg: #DDEBFF; }

.mock { background: #fff; border-radius: 18px; padding: 20px; width: min(280px, 100%); box-shadow: 0 30px 50px -30px rgba(20, 24, 43, .45); }
.mock-label { font-size: .8rem; color: var(--abu); }
.mock-big { font-family: var(--display); font-weight: 700; font-size: 1.6rem; letter-spacing: -0.02em; color: var(--tint); }
.mock-bars { display: flex; align-items: flex-end; gap: 8px; height: 90px; margin-top: 18px; }
.mock-bars i { flex: 1; height: calc(var(--h) * 100%); background: var(--tint); border-radius: 4px; opacity: .85; }

/* live screenshots sit in a plain browser frame */
.browser { margin: 0; width: 100%; border-radius: 12px; overflow: hidden; background: #fff; box-shadow: 0 30px 60px -30px rgba(20, 24, 43, .5), 0 0 0 1px rgba(20, 24, 43, .08); }
.browser-bar { display: flex; align-items: center; gap: 6px; padding: 9px 12px; background: #F6F7FA; border-bottom: 1px solid var(--garis); }
.browser-bar i { width: 9px; height: 9px; border-radius: 50%; background: var(--garis); }
.browser-bar span { flex: 1; margin-left: 8px; padding: 3px 10px; border-radius: 6px; background: #fff; font: 500 .72rem var(--mono); color: var(--abu); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.browser img { display: block; width: 100%; height: auto; }
.project-visual:has(.browser) { aspect-ratio: auto; padding: clamp(20px, 4vw, 44px); }

/* ---------- process ---------- */
.process-list { list-style: none; padding: 0; margin: 56px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; align-items: end; }
/* each stage sits one tread higher than the last */
.process-list li { background: var(--kertas); border: 1px solid var(--garis); border-top: 4px solid var(--ultra); border-radius: var(--radius); padding: 24px 22px; }
.process-list li:nth-child(2) { margin-bottom: 32px; }
.process-list li:nth-child(3) { margin-bottom: 64px; }
.process-list li:nth-child(4) { margin-bottom: 96px; border-top-color: var(--kunyit); }
.process-list .mono { color: var(--abu); text-transform: none; letter-spacing: 0; }
.process-list h3 { margin-top: 10px; font-size: 1.4rem; }
.process-list p:last-child { color: var(--abu); margin-top: 8px; font-size: .97rem; }

/* ---------- fit ---------- */
.fit { background: var(--ultra-soft); }
.fit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 40px; }
.fit-col { background: var(--kertas); border-radius: var(--radius); padding: 28px; }
.fit-col ul { margin: 16px 0 0; padding: 0; list-style: none; }
.fit-col li { padding: 10px 0 10px 28px; position: relative; border-top: 1px solid var(--garis); }
.fit-col li::before { position: absolute; left: 0; top: 9px; font-family: var(--mono); font-weight: 500; }
.fit-yes li::before { content: '+'; color: var(--ultra); }
.fit-no li::before { content: '−'; color: var(--abu); }

/* ---------- contact ---------- */
.contact { background: var(--tinta); color: #E6E8F2; }
.contact-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(32px, 6vw, 80px); }
.contact h2 { color: #fff; margin-bottom: 20px; }
.contact-grid > div > p { color: #B9BED2; max-width: 46ch; }
.contact-direct { margin-top: 18px; }
.contact-direct a { color: var(--kunyit); }
.contact-form { display: grid; gap: 20px; background: #1D2240; border: 1px solid #2C3258; border-radius: 20px; padding: clamp(20px, 3vw, 32px); }
.field { display: grid; gap: 8px; border: 0; padding: 0; margin: 0; min-width: 0; }
.field > span, .field legend { font-weight: 500; font-size: .95rem; color: #fff; padding: 0; margin-bottom: 8px; }
.field input, .field textarea {
  font: inherit; color: #fff; background: #14182B; border: 1px solid #343B66; border-radius: 10px; padding: 12px 14px; width: 100%; resize: vertical;
}
.field input:focus, .field textarea:focus { border-color: var(--kunyit); outline: none; }
.field [aria-invalid="true"] { border-color: #FF7A6B; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips label { cursor: pointer; position: relative; }
.chips input { position: absolute; opacity: 0; pointer-events: none; }
.chips span { display: inline-block; padding: 8px 14px; border-radius: 999px; border: 1px solid #343B66; font-size: .9rem; color: #C9CDE0; }
.chips input:checked + span { background: var(--kunyit); color: var(--tinta); border-color: var(--kunyit); font-weight: 600; }
.chips input:focus-visible + span { outline: 3px solid var(--kunyit); outline-offset: 2px; }
.contact-form .btn { justify-self: start; }
.contact-form .btn-solid:hover { background: var(--kunyit); border-color: var(--kunyit); color: var(--tinta); }
.form-status { font-size: .95rem; min-height: 1.5em; }
.form-status.is-error { color: #FF9B8F; }
.form-status.is-sent { color: var(--kunyit); }

/* ---------- footer ---------- */
.footer { background: var(--tinta); color: #8D93AD; border-top: 1px solid #2C3258; padding: 36px 0; font-size: .92rem; }
.footer-grid { display: grid; grid-template-columns: auto 1fr auto; gap: 24px 48px; align-items: start; }
.brand-footer { color: #fff; }
.footer a { color: #C9CDE0; }

/* ---------- background images ----------
   Generated abstract renders in assets/bg/. Each section keeps its flat colour as fallback,
   and an overlay in the same colour keeps text readable over the busier parts. */
.hero, .why, .process, .contact { position: relative; isolation: isolate; }
.hero::before, .why::before, .process::before, .contact::before {
  content: ''; position: absolute; z-index: -1; top: 0; bottom: 0;
  left: 50%; width: 100vw; transform: translateX(-50%);
  background: var(--bg-overlay), var(--bg-image) center / cover no-repeat;
}
.hero {
  --bg-image: url('../assets/bg/hero.webp');
  --bg-overlay: linear-gradient(90deg, color-mix(in srgb, var(--kapur) 75%, transparent) 0 40%, transparent 75%);
}
.hero::before { top: -80px; } /* run up under the translucent nav */
.why {
  --bg-image: url('../assets/bg/why.webp');
  --bg-overlay: linear-gradient(90deg, color-mix(in srgb, var(--tinta) 55%, transparent), color-mix(in srgb, var(--tinta) 20%, transparent));
}
.process {
  --bg-image: url('../assets/bg/process.webp');
  --bg-overlay: linear-gradient(180deg, var(--kapur) 0, transparent 35%);
}
.contact {
  --bg-image: url('../assets/bg/contact.webp');
  --bg-overlay: linear-gradient(180deg, color-mix(in srgb, var(--tinta) 60%, transparent), transparent 45%);
}
/* the 3D stage becomes a pane of frosted glass over the hero image */
.stage { background-color: color-mix(in srgb, var(--kertas) 72%, transparent); backdrop-filter: blur(6px); }

@media (max-width: 680px) {
  .hero { --bg-image: url('../assets/bg/hero-m.webp'); --bg-overlay: linear-gradient(180deg, color-mix(in srgb, var(--kapur) 70%, transparent), transparent 60%); }
  .why { --bg-image: url('../assets/bg/why-m.webp'); --bg-overlay: linear-gradient(color-mix(in srgb, var(--tinta) 60%, transparent), color-mix(in srgb, var(--tinta) 60%, transparent)); }
  .process { --bg-image: url('../assets/bg/process-m.webp'); }
  .contact { --bg-image: url('../assets/bg/contact-m.webp'); --bg-overlay: linear-gradient(color-mix(in srgb, var(--tinta) 65%, transparent), color-mix(in srgb, var(--tinta) 65%, transparent)); }
}

/* ---------- reveal on scroll ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero { grid-template-columns: minmax(0, 1fr); min-height: 0; }
  .stage { height: 520px; min-height: 0; }
  .why-grid, .contact-grid { grid-template-columns: 1fr; }
  .process-list { grid-template-columns: 1fr 1fr; }
  .process-list li { margin-bottom: 0 !important; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .nav nav a:not(.nav-cta) { display: none; }
  .stage { height: 460px; border-radius: 18px; }
  .stage-card { left: 12px; top: 12px; width: calc(100% - 24px); }
  .stage-steps { left: 12px; right: 12px; bottom: 38px; }
  .stage-steps button { padding: 6px 10px; font-size: .8rem; }
  .stage-hint { display: none; }
  .principle-list, .service-grid, .fit-grid, .process-list, .project { grid-template-columns: 1fr; }
  .principle-list li, .principle-list li:nth-child(even) { padding: 24px 0; border-right: 0; }
  .project-flip .project-visual { order: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0s !important; animation-duration: 0s !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ---------- 404 ---------- */
.notfound { max-width: var(--max); margin: 0 auto; padding: clamp(64px, 12vw, 160px) var(--gutter); min-height: calc(100svh - 64px); }
.notfound h1 { font-size: clamp(2.6rem, 7vw, 5.2rem); line-height: 0.95; letter-spacing: -0.035em; font-weight: 800; }
.notfound h1 em { font-style: normal; color: var(--ultra); display: block; }

/* ---------- legal pages ---------- */
.legal { max-width: 760px; margin: 0 auto; padding: clamp(48px, 8vw, 96px) var(--gutter) clamp(72px, 10vw, 120px); }
.legal h1 { font-size: clamp(2.4rem, 6vw, 3.8rem); line-height: 1; letter-spacing: -0.03em; font-weight: 800; }
.legal-date { color: var(--abu); margin-top: 14px; text-transform: none; }
.legal-intro { margin-top: 24px; font-size: 1.1rem; }
.legal section { padding: 0; margin-top: 44px; scroll-margin-top: 88px; }
.legal h2 { font-size: 1.45rem; letter-spacing: -0.015em; }
.legal p, .legal ul { margin-top: 12px; }
.legal ul { padding-left: 1.2em; }
.legal li { margin-top: 8px; }
.legal li::marker { color: var(--ultra); }
.legal a { color: var(--ultra); text-underline-offset: 3px; }
.legal-summary { margin-top: 36px; padding: 22px 24px; background: var(--kertas); border: 1px solid var(--garis); border-left: 4px solid var(--kunyit); border-radius: var(--radius); }
.legal-summary h2 { font-size: 1.1rem; }
.legal-summary p { color: var(--abu); font-size: .92rem; }
.legal-toc { margin-top: 32px; padding: 18px 24px; border: 1px solid var(--garis); border-radius: var(--radius); }
.legal-toc ol { margin: 0; padding-left: 1.4em; columns: 2; column-gap: 32px; font-size: .95rem; }
.legal-toc li { margin: 4px 0; break-inside: avoid; }
.legal-toc li::marker { font-family: var(--mono); font-size: .8em; color: var(--abu); }
.legal-contact { margin: 16px 0 0; border-top: 1px solid var(--garis); }
.legal-contact div { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--garis); }
.legal-contact dt { font: 500 .75rem var(--mono); text-transform: uppercase; letter-spacing: .04em; color: var(--ultra); padding-top: 4px; }
.legal-contact dd { margin: 0; }
@media (max-width: 680px) {
  .legal-toc ol { columns: 1; }
  .legal-contact div { grid-template-columns: 1fr; gap: 2px; }
}