/* Bles Software Academy landing (task 9074 follow-up). Tokens and fonts from the Body Atlas app (tokens.css), the glass
   cards from the premium 3D kit. Locked on scroll: nothing here reads the scroll; the 3D body lives in its own box,
   cards enter by depth and turn (the kit), the section worlds fade by a CSS view timeline. */

:root {
  --appbar-h: calc(64px + env(safe-area-inset-top));
  --pad-x: max(var(--gutter), env(safe-area-inset-left), env(safe-area-inset-right));
  --wrap: 1200px;
  --soft: #c9d2df;
  --teal: #5ad1e6;
  --p3-a: #5ad1e6;
  --p3-b: #d8f6fb;
  --p3-d: #02040a;
  --p3-top: calc(var(--appbar-h) + 16px);
}
html { background: var(--ink); overflow-x: clip; scroll-behavior: smooth; scroll-padding-top: var(--appbar-h); }
body { overflow-x: clip; }
a { color: inherit; }
::selection { background: rgba(90, 209, 230, .35); color: #fff; }
.defs { position: absolute; }
.ic { width: 1em; height: 1em; flex: none; }
.wrap { width: min(100% - 2 * var(--pad-x), var(--wrap)); margin-inline: auto; }

/* ---------- buttons ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: .55em;
  min-height: 48px; padding: 0 1.35em; border-radius: var(--r-pill);
  font: 600 1rem/1 var(--font-ui); text-decoration: none; white-space: nowrap; color: var(--text);
  transition: background-color .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.btn .ic { width: 1.1em; height: 1.1em; }
.btn .go { width: 1em; height: 1em; }
[dir="rtl"] .btn .go { transform: scaleX(-1); }
.btn-primary {
  color: #fff;
  background: linear-gradient(180deg, rgba(255, 255, 255, .16), rgba(255, 255, 255, 0) 55%), linear-gradient(180deg, #d42a42, #9e1226);
  box-shadow: 0 12px 28px -10px rgba(0, 0, 0, .7), inset 0 0 0 1px rgba(255, 140, 150, .35), inset 0 1px 0 rgba(255, 255, 255, .35);
}
.btn-primary:hover { background: linear-gradient(180deg, rgba(255, 255, 255, .22), rgba(255, 255, 255, 0) 55%), linear-gradient(180deg, #e0334b, #a8152a); }
.btn-ghost { background: rgba(255, 255, 255, .045); border: 1px solid var(--line-strong); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }
.btn-ghost:hover { background: rgba(255, 255, 255, .09); border-color: rgba(255, 255, 255, .38); }
.btn-lg { min-height: 56px; padding: 0 1.6em; font-size: 1.06rem; }

/* ---------- glass ---------- */
.glass {
  position: relative; border-radius: var(--r-lg); border: 1px solid var(--line);
  background: linear-gradient(155deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .02) 42%), rgba(12, 20, 36, .62);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow);
}
.glass::before { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; background: var(--gloss); }

/* ---------- the app bar: fixed, always one tap from the app ---------- */
.bar {
  position: fixed; z-index: 50; top: 0; inset-inline: 0; height: var(--appbar-h);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: env(safe-area-inset-top) var(--pad-x) 0;
  background: linear-gradient(180deg, rgba(6, 10, 19, .88), rgba(6, 10, 19, .7));
  -webkit-backdrop-filter: blur(16px) saturate(150%); backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid rgba(255, 255, 255, .08); box-shadow: 0 10px 30px rgba(0, 0, 0, .28);
}
.brand { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; text-decoration: none; }
.mark {
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 11px; color: #fff;
  background: radial-gradient(circle at 35% 30%, #b8f1fa, var(--teal) 50%, #1d7f93);
  box-shadow: 0 6px 14px -6px rgba(0, 0, 0, .8), inset 0 1px 0 rgba(255, 255, 255, .5);
}
.mark .ic { width: 21px; height: 21px; }
.brand-name { font: 700 1.14rem/1 var(--font-display); letter-spacing: -.01em; white-space: nowrap; }
.brand-name b { font-weight: 900; color: var(--teal); }
.bar-end { display: inline-flex; align-items: center; gap: 10px; }
.lang {
  display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 0 10px;
  border-radius: var(--r-pill); border: 1px solid var(--line); color: var(--soft); text-decoration: none; font: 600 .9rem/1 var(--font-ui);
}
.lang:hover { color: var(--text); border-color: rgba(255, 255, 255, .38); }
.btn-bar { min-height: 44px; padding: 0 1.05em; font-size: .95rem; }
.btn-bar .short { display: none; }
@media (max-width: 430px) {
  .bar, .bar-end, .brand { gap: 8px; }
  .mark { width: 32px; height: 32px; }
  .brand-name { font-size: 1.02rem; }
  .btn-bar { padding: 0 .9em; font-size: .9rem; }
  .btn-bar .long { display: none; }
  .btn-bar .short { display: inline; }
}

/* ---------- hero ---------- */
.hero {
  position: relative; isolation: isolate; min-height: 100svh;
  padding: calc(var(--appbar-h) + clamp(20px, 5vh, 56px)) var(--pad-x) clamp(36px, 6vh, 64px);
  display: grid; gap: clamp(18px, 3vw, 48px); align-items: center;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  max-width: calc(var(--wrap) + 2 * var(--pad-x)); margin-inline: auto;
}
.hero::before { /* the world behind the hero: a teal dawn and the heart's red */
  content: ""; position: absolute; inset: 0 -50vw; z-index: -1; pointer-events: none;
  background:
    radial-gradient(40% 50% at 70% 45%, rgba(255, 77, 94, .16), transparent 70%),
    radial-gradient(50% 60% at 15% 20%, rgba(90, 209, 230, .14), transparent 70%),
    linear-gradient(180deg, #070b16, var(--ink) 75%);
}
.eyebrow { margin: 0 0 24px; font: 700 .86rem/1 var(--font-ui); letter-spacing: .14em; text-transform: uppercase; color: var(--teal); }
[dir="rtl"] .eyebrow { letter-spacing: .02em; }
.hero h1 { margin: 0; font: 900 clamp(2.7rem, 1.4rem + 5.2vw, 5.4rem)/1.04 var(--font-display); letter-spacing: -.035em; text-wrap: balance; }
.hero h1 span { display: block; }
.hero h1 .accent { background: linear-gradient(90deg, var(--teal), #b8f1fa 45%, var(--left)); -webkit-background-clip: text; background-clip: text; color: transparent; }
[dir="rtl"] .hero h1 .accent { background: linear-gradient(270deg, var(--teal), #b8f1fa 45%, var(--left)); -webkit-background-clip: text; background-clip: text; }
.lede { margin: clamp(16px, 2.6vh, 26px) 0 0; max-width: 40ch; color: var(--soft); font-size: clamp(1.05rem, .98rem + .4vw, 1.28rem); line-height: 1.6; }
.who { margin: 12px 0 0; max-width: 44ch; font: 600 clamp(.98rem, .92rem + .3vw, 1.1rem)/1.5 var(--font-ui); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: clamp(22px, 3.4vh, 34px); }

.stage3d { margin: 0; height: min(76svh, 720px); min-height: 420px; padding: 0; overflow: hidden; }
.stage3d::after { /* a gloss band crossing the glass */
  content: ""; position: absolute; inset: -20% -40%; z-index: 5; pointer-events: none;
  background: linear-gradient(115deg, transparent 38%, rgba(255, 255, 255, .10) 47%, rgba(255, 255, 255, .02) 53%, transparent 60%);
  animation: band 9s var(--ease) infinite;
}
@keyframes band { 0%, 55% { transform: translateX(-30%); } 100% { transform: translateX(30%); } }
.body-box { position: absolute; inset: 0; touch-action: pan-y; cursor: grab; -webkit-user-select: none; user-select: none;
  background: radial-gradient(50% 42% at 50% 40%, rgba(255, 77, 94, .2), transparent 70%), radial-gradient(60% 40% at 50% 100%, rgba(90, 209, 230, .12), transparent 70%); }
.body-box.is-drag { cursor: grabbing; }
.body-slot { position: absolute; inset: 22px 16px 70px; pointer-events: none; }
.body-box canvas.gl { position: absolute; inset: 0; width: 100%; height: 100%; display: block; opacity: 0; transition: opacity 1.2s var(--ease); }
.body-box.is-ready canvas.gl { opacity: 1; }
.tag {
  position: absolute; left: 0; top: 0; z-index: 4; display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 11px 6px 12px; border-radius: var(--r-pill); border: 1px solid;
  font: 600 .86rem/1 var(--font-ui); white-space: nowrap; pointer-events: none;
  background: rgba(6, 10, 19, .62); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  opacity: 0; transition: opacity .45s var(--ease); will-change: transform, opacity;
}
.tag .ic { width: 13px; height: 13px; }
.tag-l { color: #ff7a87; border-color: rgba(255, 77, 94, .65); background-color: rgba(40, 8, 16, .66); }
.tag-r { color: var(--right); border-color: rgba(90, 209, 230, .6); background-color: rgba(6, 26, 34, .66); }
.tag::before { content: ""; position: absolute; top: 50%; width: 7px; height: 7px; margin-top: -3.5px; border-radius: 50%; background: currentColor; }
.tag[data-dir="r"]::before { left: -15px; }
.tag[data-dir="l"]::before { right: -15px; }
.tag.is-on { opacity: 1; }
.stage-cap {
  position: absolute; z-index: 6; inset-inline: 14px; bottom: 14px; display: flex; align-items: center; gap: 8px;
  padding: 9px 14px; border-radius: var(--r-pill); font: 600 .84rem/1.2 var(--font-ui); color: var(--soft);
  background: rgba(6, 10, 19, .6); border: 1px solid var(--line); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
.stage-cap .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--left); box-shadow: 0 0 0 4px rgba(255, 77, 94, .2); animation: pulse 1.1s infinite; }
.stage-cap .drag { margin-inline-start: auto; color: var(--muted); font-weight: 500; }
@keyframes pulse { 0%, 100% { transform: scale(1); } 10% { transform: scale(1.35); } 30% { transform: scale(1.1); } }

@media (max-width: 899px) {
  .hero { grid-template-columns: minmax(0, 1fr); min-height: 0; padding-top: calc(var(--appbar-h) + 24px); }
  .stage3d { height: 62svh; min-height: 380px; max-height: 560px; }
  .actions .btn { flex: 1 1 auto; }
}

/* ---------- sections and their worlds ---------- */
section { position: relative; padding: clamp(72px, 10vw, 140px) 0; isolation: isolate; }
section::before { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: 1; }
.apps::before { background: radial-gradient(60% 50% at 80% 30%, rgba(255, 77, 94, .12), transparent 70%), linear-gradient(180deg, var(--ink), #0a0f1d 50%, var(--ink)); }
.who-sec::before { background: radial-gradient(55% 55% at 20% 40%, rgba(90, 209, 230, .12), transparent 70%), linear-gradient(180deg, var(--ink), #07121a 50%, var(--ink)); }
.how::before { background: radial-gradient(50% 50% at 50% 60%, rgba(233, 226, 208, .07), transparent 70%), var(--ink); }
.by::before { background: radial-gradient(50% 60% at 50% 50%, rgba(255, 77, 94, .14), transparent 70%), linear-gradient(180deg, var(--ink), #12060b 60%, #04070e); }
@supports (animation-timeline: view()) {
  section::before { opacity: .25; animation: world linear both; animation-timeline: view(); animation-range: entry 0% cover 45%; }
  @keyframes world { to { opacity: 1; } }
}
.title { margin: 0; font: 900 clamp(2.1rem, 1.3rem + 3vw, 3.9rem)/1 var(--font-display); letter-spacing: -.03em; text-wrap: balance; }
.sub { margin: 14px 0 0; max-width: 52ch; color: var(--soft); font-size: clamp(1.02rem, .96rem + .3vw, 1.18rem); }

/* ---------- the app card ---------- */
.app { margin-top: clamp(36px, 5vw, 60px); display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(20px, 4vw, 56px);
  padding: clamp(20px, 3.4vw, 44px); align-items: center; overflow: hidden; }
.app-shots { position: relative; height: clamp(420px, 44vw, 560px); }
.phone { position: absolute; top: 0; width: auto; height: 100%; aspect-ratio: 540 / 1168; border-radius: 28px; object-fit: cover;
  border: 1px solid rgba(255, 255, 255, .18); box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .8), 0 0 0 6px rgba(10, 14, 24, .9), 0 0 0 7px rgba(255, 255, 255, .12); background: #000; }
.phone-a { inset-inline-start: 0; z-index: 2; }
.phone-b { inset-inline-start: 42%; top: 8%; height: 92%; z-index: 1; opacity: .92; }
.app-no { margin: 0; font: 700 .82rem/1 var(--font-mono); letter-spacing: .12em; color: var(--teal); text-transform: uppercase; }
[dir="rtl"] .app-no { font-family: var(--font-ui); letter-spacing: .02em; font-size: .9rem; }
.app-name { display: flex; align-items: center; gap: 14px; margin: 12px 0 0; font: 900 clamp(2rem, 1.4rem + 2.2vw, 3.2rem)/1 var(--font-display); letter-spacing: -.02em; }
.app-icon { display: grid; place-items: center; width: 56px; height: 56px; border-radius: 16px; color: #fff; flex: none;
  background: radial-gradient(circle at 40% 35%, #ff8a95, var(--left) 55%, #a3172a); box-shadow: 0 10px 22px -8px rgba(0, 0, 0, .8), inset 0 1px 0 rgba(255, 255, 255, .45); }
.app-icon .ic { width: 30px; height: 30px; animation: pulse 1.1s infinite; }
.app-line { margin: 14px 0 0; color: var(--soft); font-size: clamp(1.02rem, .97rem + .25vw, 1.15rem); line-height: 1.6; max-width: 48ch; }
.feats { list-style: none; margin: 20px 0 0; padding: 0; display: grid; gap: 10px; }
.feats li { display: flex; gap: 10px; align-items: flex-start; line-height: 1.45; }
.feats .ic { width: 20px; height: 20px; margin-top: 1px; color: var(--ok); }
.chips { list-style: none; margin: 20px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li { padding: 7px 13px; border-radius: var(--r-pill); font: 600 .86rem/1 var(--font-ui); color: var(--soft); background: rgba(255, 255, 255, .05); border: 1px solid var(--line); }
.app-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
@media (max-width: 899px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .app-shots { height: min(118vw, 520px); order: 2; }
  .phone-b { inset-inline-start: 46%; }
  .app-actions .btn { flex: 1 1 auto; }
}

/* ---------- who it is for ---------- */
.who-grid { list-style: none; margin: clamp(32px, 4vw, 52px) 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(12px, 1.6vw, 20px); }
.who-grid li { padding: 22px 20px 24px; }
.w-ic { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 14px; color: var(--teal); background: rgba(90, 209, 230, .1); border: 1px solid rgba(90, 209, 230, .3); }
.w-ic .ic { width: 24px; height: 24px; }
.who-grid h3, .steps h3 { margin: 16px 0 0; font: 800 1.25rem/1.2 var(--font-display); }
.who-grid p, .steps p { margin: 8px 0 0; color: var(--soft); line-height: 1.55; }
@media (max-width: 1023px) { .who-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .who-grid { grid-template-columns: minmax(0, 1fr); } }

/* ---------- how it works ---------- */
.steps { list-style: none; margin: clamp(32px, 4vw, 52px) 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(12px, 1.6vw, 20px); }
.steps li { padding: 24px 22px 26px; }
.steps b { font: 900 2.4rem/1 var(--font-display); color: transparent; -webkit-text-stroke: 1.2px rgba(90, 209, 230, .8); }
@media (max-width: 760px) { .steps { grid-template-columns: minmax(0, 1fr); } }

/* ---------- built by ---------- */
.by-wrap { padding: clamp(28px, 5vw, 64px); text-align: center; }
.by-wrap p { margin: 16px auto 0; max-width: 52ch; color: var(--soft); font-size: clamp(1.02rem, .97rem + .3vw, 1.2rem); }
.by-wrap .actions { justify-content: center; }

/* ---------- footer ---------- */
.foot { background: #04070e; padding: 40px 0 max(40px, env(safe-area-inset-bottom)); border-top: 1px solid rgba(255, 255, 255, .06); }
.foot-wrap { display: grid; gap: 10px; }
.foot .note { margin: 6px 0 4px; color: var(--soft); max-width: 70ch; }
.foot .credit { margin: 0; color: var(--muted); font-size: .84rem; line-height: 1.55; }
.foot .credit .latin { font-size: .8rem; }