/* Colours and type follow the Jandify Global site (src/app/theme.css, brand #4338ca). */
:root {
  color-scheme: light;
  --paper: #f3f4fa;
  --sheet: #ffffff;
  --rule: #d9dbee;
  --ink: #151242;
  --ink-soft: #38376b;
  --muted: #4c4a80;
  --brand: #4338ca;
  --on-brand: #ffffff;
  --brand-hover: #2f278d;
  --brand-tint: #eae9f9;
  --panel-deep: #171447;
  --on-panel: #e6e6f7;
  --on-panel-muted: #b9b8e3;
  --focus: #4338ca;
  --ok: #1f7a52;
  --glow: rgb(67 56 202 / 0.16);
  --shadow: 18 24 64;

  --env-back: #2f278d;
  --env-flap-a: #6a62e2;
  --env-flap-b: #4a40d4;
  --env-side-a: #4f46d8;
  --env-side-b: #4338ca;
  --env-base-a: #3a31b8;
  --env-base-b: #5d55de;
  --env-edge: rgb(255 255 255 / 0.35);
  --letter: #ffffff;
  --letter-line: #e3e4f3;
  --chip: rgb(255 255 255 / 0.82);

  --font-display: "Bricolage Grotesque", "Public Sans", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Public Sans", ui-sans-serif, system-ui, sans-serif;
  --font-data: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --ease-drawer: cubic-bezier(0.32, 0.72, 0, 1);
  --gutter: clamp(16px, 4vw, 40px);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --paper: #0b0a24;
    --sheet: #100f35;
    --rule: #27255c;
    --ink: #e9e9fa;
    --ink-soft: #c5c4ea;
    --muted: #9d9bd2;
    --brand: #a49ee5;
    --on-brand: #0d0d12;
    --brand-hover: #bbb6ec;
    --brand-tint: #22204a;
    --panel-deep: #201f3f;
    --focus: #bbb6ec;
    --ok: #6fd1a4;
    --glow: rgb(90 80 208 / 0.28);
    --shadow: 0 0 0;

    --env-back: #1d1870;
    --env-flap-a: #5a50d0;
    --env-flap-b: #3d34b5;
    --env-side-a: #4239bf;
    --env-side-b: #3830ad;
    --env-base-a: #2c259a;
    --env-base-b: #4a41c9;
    --env-edge: rgb(255 255 255 / 0.22);
    --letter: #1c1a4d;
    --letter-line: #2e2c66;
    --chip: rgb(22 21 67 / 0.82);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1rem/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
h1, h2, h3 { font-family: var(--font-display); color: var(--ink); margin: 0; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
a { color: inherit; }
img, svg { display: block; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 6px; }

.wrap { width: 100%; max-width: 1200px; margin-inline: auto; padding-inline: var(--gutter); }
.mono { font-family: var(--font-data); font-weight: 500; letter-spacing: -0.01em; overflow-wrap: anywhere; }

.skip {
  position: absolute; left: 16px; top: -60px; z-index: 10;
  background: var(--brand); color: var(--on-brand); padding: 12px 16px; border-radius: 8px;
  font-weight: 600; text-decoration: none; transition: top .2s var(--ease-out);
}
.skip:focus { top: 12px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 22px; border-radius: 10px;
  font: 600 0.9375rem/1 var(--font-body); text-decoration: none; white-space: nowrap;
  border: 1px solid transparent;
  transition: background-color .2s ease, border-color .2s ease, transform .12s var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.97); }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: .875rem; }
.btn-primary { background: var(--brand); color: var(--on-brand); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn-light { background: #ffffff; color: #171447; }
.btn-outline-light { background: transparent; color: #ffffff; border-color: rgb(255 255 255 / .4); }
@media (hover: hover) and (pointer: fine) {
  .btn-primary:hover { background: var(--brand-hover); }
  .btn-ghost:hover { border-color: var(--brand); background: var(--brand-tint); }
  .btn-light:hover { background: #e6e6f7; }
  .btn-outline-light:hover { background: rgb(255 255 255 / .12); border-color: #ffffff; }
}

/* Nav */
.nav { position: relative; z-index: 2; }
.nav-row { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 16px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px; min-height: 44px;
  font: 700 1.25rem/1 var(--font-display); letter-spacing: -0.02em; text-decoration: none;
}
.brand-tld { color: var(--muted); font-weight: 600; }

/* Hero */
.hero {
  position: relative;
  background: radial-gradient(60% 70% at 78% 45%, var(--glow), transparent 70%);
}
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  align-items: center; gap: 32px;
  min-height: min(calc(100svh - 72px), 820px);
  padding-block: 24px 64px;
}
.eyebrow {
  font: 500 .8125rem/1.2 var(--font-data); letter-spacing: .06em; text-transform: uppercase;
  color: var(--brand); margin-bottom: 18px;
}
h1 {
  font-size: clamp(2.375rem, 5.6vw, 4.25rem); font-weight: 700;
  line-height: 1.02; letter-spacing: -0.035em; max-width: 13ch;
}
.lede { font-size: clamp(1.0625rem, 1.4vw, 1.1875rem); line-height: 1.6; color: var(--ink-soft); max-width: 46ch; margin-top: 22px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.fact { margin-top: 22px; font-size: .9375rem; color: var(--muted); }
.fact .mono { color: var(--ink); }

/* The envelope scene: CSS 3D planes inside one perspective */
.scene {
  --ew: clamp(250px, 32vw, 400px);
  position: relative; height: calc(var(--ew) * 1.25);
  perspective: 1100px; perspective-origin: 50% 35%;
  animation: scene-in .5s var(--ease-out) both;
}
.rig {
  position: absolute; inset: 0;
  transform-style: preserve-3d;
  transform: rotateX(10deg) rotateY(-18deg);
  will-change: transform;
}
.env {
  position: absolute; left: 50%; top: 62%;
  width: var(--ew); aspect-ratio: 100 / 64;
  transform: translate(-50%, -50%);
  transform-style: preserve-3d;
}
.env > * { position: absolute; }
.env-shadow {
  left: -6%; right: -6%; top: 70%; height: 60%;
  background: radial-gradient(50% 50% at 50% 50%, rgb(var(--shadow) / .28), transparent 70%);
  transform: translateZ(-40px) rotateX(70deg);
}
.env-back {
  inset: 0; border-radius: 10px; background: var(--env-back);
  box-shadow: 0 30px 60px -20px rgb(var(--shadow) / .45);
}
.flap {
  left: 0; top: 0; width: 100%; height: 58%;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  background: linear-gradient(180deg, var(--env-flap-a), var(--env-flap-b));
  transform-origin: 50% 0;
  transform: translateZ(2px) rotateX(180deg);
  animation: flap-open .75s var(--ease-in-out) .45s both;
}
.letter {
  left: 6%; right: 6%; top: 5%; height: 90%;
  background: var(--letter); border-radius: 8px;
  padding: calc(var(--ew) * .05);
  box-shadow: 0 12px 28px -10px rgb(var(--shadow) / .35);
  transform: translateZ(8px) translateY(-42%);
  animation: letter-rise .85s var(--ease-drawer) 1s both;
  color: var(--ink);
}
.letter-head { display: flex; align-items: center; gap: calc(var(--ew) * .03); }
.avatar {
  flex: none; display: grid; place-items: center;
  width: calc(var(--ew) * .09); aspect-ratio: 1; border-radius: 50%;
  background: var(--brand-tint); color: var(--brand);
  font: 700 calc(var(--ew) * .04)/1 var(--font-display);
}
.letter-from { display: grid; min-width: 0; }
.letter-from b { font: 600 calc(var(--ew) * .04)/1.25 var(--font-body); }
.letter-from small { font: 500 calc(var(--ew) * .029)/1.3 var(--font-data); color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.letter-subject {
  margin: calc(var(--ew) * .05) 0 calc(var(--ew) * .03);
  font: 700 calc(var(--ew) * .058)/1.1 var(--font-display); letter-spacing: -0.02em;
}
.line { display: block; height: calc(var(--ew) * .016); border-radius: 99px; background: var(--letter-line); margin-top: calc(var(--ew) * .024); }
.line.short { width: 55%; }
.seal {
  position: absolute; right: calc(var(--ew) * .05); top: calc(var(--ew) * .05);
  display: grid; place-items: center;
  width: calc(var(--ew) * .085); aspect-ratio: 1; border-radius: 50%;
  background: var(--ok); color: #ffffff;
  animation: seal-pop .35s var(--ease-out) 1.7s both;
}
.seal svg { width: 60%; height: 60%; }
.pocket { inset: 0; width: 100%; height: 100%; transform: translateZ(14px); }

.chip {
  position: absolute; display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 14px; border-radius: 999px;
  background: var(--chip); color: var(--ink);
  border: 1px solid var(--rule);
  -webkit-backdrop-filter: blur(14px) saturate(160%); backdrop-filter: blur(14px) saturate(160%);
  box-shadow: 0 10px 30px -12px rgb(var(--shadow) / .35);
  font: 500 clamp(.75rem, calc(var(--ew) * .034), .875rem)/1 var(--font-body); white-space: nowrap;
  animation: chip-in .45s var(--ease-out) both;
}
.chip svg { color: var(--brand); flex: none; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--brand); flex: none; }
.chip-a { left: 4%; top: 6%; transform: translateZ(70px); animation-delay: 1.75s; }
.chip-b { right: 0; top: 46%; transform: translateZ(100px); animation-delay: 1.85s; }
.chip-b svg { color: var(--ok); }
.chip-c { left: 0; bottom: 6%; transform: translateZ(50px); animation-delay: 1.95s; }

@keyframes scene-in { from { opacity: 0; } }
@keyframes flap-open {
  0% { transform: translateZ(16px) rotateX(0deg); }
  50% { transform: translateZ(16px) rotateX(90deg); }
  50.1% { transform: translateZ(2px) rotateX(90deg); }
  100% { transform: translateZ(2px) rotateX(180deg); }
}
@keyframes letter-rise { from { transform: translateZ(8px) translateY(0); } }
@keyframes seal-pop { from { opacity: 0; transform: scale(.6); } }
@keyframes chip-in { from { opacity: 0; translate: 0 12px; scale: .96; } }

/* Sections */
.about, .features { padding-block: clamp(80px, 11vw, 140px); }
.about { border-top: 1px solid var(--rule); background: var(--sheet); }
h2 { font-size: clamp(1.75rem, 3.6vw, 2.75rem); font-weight: 700; line-height: 1.08; letter-spacing: -0.03em; max-width: 22ch; }

.anatomy { display: flex; flex-wrap: wrap; align-items: flex-start; margin-top: clamp(40px, 6vw, 72px); }
.part { display: grid; gap: 14px; }
.part-text {
  font: 500 clamp(1.5rem, 5.4vw, 4rem)/1 var(--font-data); letter-spacing: -0.035em;
  padding-bottom: 16px; border-bottom: 2px solid var(--rule);
}
.part-domain .part-text { color: var(--brand); border-bottom-color: var(--brand); }
.part-label { font-size: .9375rem; color: var(--muted); padding-right: 24px; }
.about-copy { margin-top: clamp(32px, 4vw, 48px); max-width: 58ch; font-size: 1.0625rem; color: var(--ink-soft); }

.feature-grid {
  list-style: none; margin: clamp(40px, 5vw, 64px) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px;
}
.feature { background: var(--sheet); border: 1px solid var(--rule); border-radius: 16px; padding: 28px 24px 30px; }
.icon {
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 10px;
  background: var(--brand-tint); color: var(--brand); margin-bottom: 22px;
}
.feature h3 { font-size: 1.1875rem; font-weight: 600; letter-spacing: -0.015em; line-height: 1.25; }
.feature p { margin-top: 8px; color: var(--ink-soft); font-size: .96875rem; line-height: 1.55; }

.closing { background: var(--panel-deep); color: var(--on-panel); }
.closing-row {
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  padding-block: clamp(56px, 7vw, 88px);
}
.closing h2 { color: #ffffff; }
.closing p { margin-top: 12px; color: var(--on-panel-muted); max-width: 52ch; font-size: 1.0625rem; }
.closing :focus-visible { outline-color: #ffffff; }

.footer { border-top: 1px solid var(--rule); }
.footer-row {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px;
  padding-block: 20px; font-size: .9375rem; color: var(--muted);
}
.footer nav { display: flex; flex-wrap: wrap; gap: 0 20px; }
.footer a {
  display: inline-flex; align-items: center; min-height: 44px;
  color: var(--ink); text-decoration: underline; text-decoration-color: var(--rule);
  text-underline-offset: 4px; transition: text-decoration-color .2s ease;
}
@media (hover: hover) and (pointer: fine) { .footer a:hover { text-decoration-color: currentColor; } }

/* Responsive */
@media (max-width: 1023px) {
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 879px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); min-height: 0; padding-block: 16px 56px; gap: 8px; }
  .scene { --ew: min(340px, 72vw); order: -1; }
  .closing-row { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 559px) {
  .feature-grid { grid-template-columns: minmax(0, 1fr); }
  .actions .btn { width: 100%; }
  .part-label { padding-right: 0; }
  .chip { padding: 7px 11px; }
}

/* Reduced motion: the scene rests in its open state and nothing moves */
@media (prefers-reduced-motion: reduce) {
  .scene, .flap, .letter, .seal, .chip { animation: none; }
  .btn { transition: background-color .2s ease, border-color .2s ease; }
  .btn:active { transform: none; }
}
@media (prefers-reduced-transparency: reduce) {
  .chip { background: var(--sheet); -webkit-backdrop-filter: none; backdrop-filter: none; }
}