/* =================================================================
   PowerPlan(t) — case study
   Forest-green wellness theme, cohesive with the dark portfolio.
   Fonts: Poppins (display) + JetBrains Mono (labels)
   ================================================================= */
:root{
  --pp-bg:#0b1310;
  --pp-bg2:#0f1a14;
  --pp-forest:#16271d;
  --pp-card:#13211a;
  --pp-line:rgba(255,255,255,.09);
  --pp-line-strong:rgba(255,255,255,.16);
  --pp-lime:#9BD158;
  --pp-lime-bright:#B6E86A;
  --pp-sun:#F4C257;
  --pp-peach:#EFA577;
  --pp-cream:#EAF2E9;
  --pp-dim:#9DB3A3;
  --pp-faint:#5d6f63;
  --pp-grad:linear-gradient(120deg,var(--pp-lime),var(--pp-sun));
  --maxw:1160px;
  --navh:64px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:var(--navh); }
body{
  margin:0; color-scheme:dark;
  background:
    radial-gradient(120% 70% at 80% -5%, rgba(244,194,87,.10), transparent 55%),
    radial-gradient(100% 60% at 0% 0%, rgba(155,209,88,.10), transparent 50%),
    var(--pp-bg);
  color:var(--pp-cream);
  font-family:"Poppins",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
a{ color:inherit; text-decoration:none; }
.mono{ font-family:"JetBrains Mono",monospace; }

/* ============================ NAV ============================ */
.pp-nav{
  position:fixed; inset:0 0 auto 0; z-index:50; height:var(--navh);
  display:flex; align-items:center; justify-content:space-between;
  padding:0 clamp(18px,4vw,40px);
  background:linear-gradient(180deg, rgba(11,19,16,.7), rgba(11,19,16,0));
  transition:background .35s var(--ease), border-color .35s var(--ease);
  border-bottom:1px solid transparent;
}
.pp-nav.scrolled{ background:rgba(9,15,12,.9); backdrop-filter:blur(14px) saturate(1.2); border-bottom-color:var(--pp-line); }
.pp-back{ display:inline-flex; align-items:center; gap:10px; font-family:"JetBrains Mono",monospace; font-size:13.5px; color:var(--pp-cream); }
.pp-back .ar{ transition:transform .25s var(--ease); }
.pp-back:hover .ar{ transform:translateX(-4px); }
.pp-nav-right{ display:flex; align-items:center; gap:18px; font-family:"JetBrains Mono",monospace; font-size:13px; }
.pp-nav-right a{ color:var(--pp-dim); transition:color .2s; }
.pp-nav-right a:hover{ color:var(--pp-cream); }
.pp-nav-right .gh{ color:#08130c; background:var(--pp-lime); padding:8px 15px; border-radius:999px; font-weight:700; transition:transform .2s, box-shadow .3s; }
.pp-nav-right .gh:hover{ transform:translateY(-1px); box-shadow:0 8px 22px -8px rgba(155,209,88,.7); }

/* ============================ HERO ============================ */
.pp-hero{
  position:relative; max-width:var(--maxw); margin:0 auto;
  padding:calc(var(--navh) + clamp(40px,8vh,96px)) clamp(18px,4vw,40px) clamp(48px,8vh,90px);
  display:grid; grid-template-columns:1.05fr .95fr; gap:clamp(28px,5vw,64px); align-items:center;
}
.pp-hero-glow{ position:absolute; right:6%; top:6%; width:480px; height:480px; z-index:-1;
  background:radial-gradient(circle, rgba(244,194,87,.20), rgba(155,209,88,.10) 45%, transparent 68%); filter:blur(8px); }
.pp-eyebrow{ font-family:"JetBrains Mono",monospace; font-size:13px; letter-spacing:.22em; text-transform:uppercase;
  color:var(--pp-lime); display:flex; align-items:center; gap:11px; margin:0 0 22px; }
.pp-eyebrow::before{ content:""; width:26px; height:1px; background:var(--pp-lime); }
.pp-title{ font-size:clamp(46px,7vw,86px); font-weight:800; line-height:.96; letter-spacing:-.03em; margin:0 0 8px; }
.pp-title .t{ color:var(--pp-lime-bright); }
.pp-sub{ font-size:clamp(17px,2vw,22px); line-height:1.5; color:var(--pp-cream); margin:0 0 14px; font-weight:500; max-width:30ch; }
.pp-lead{ font-size:clamp(15px,1.6vw,17px); line-height:1.6; color:var(--pp-dim); margin:0 0 28px; max-width:46ch; }
.pp-meta{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:30px; }
.pp-chip{ font-family:"JetBrains Mono",monospace; font-size:12px; padding:6px 12px; border-radius:999px;
  border:1px solid var(--pp-line); color:var(--pp-dim); }
.pp-chip.on{ color:#08130c; background:var(--pp-lime); border-color:transparent; font-weight:700; }
.pp-cta{ display:flex; gap:12px; flex-wrap:wrap; }
.pp-btn{ font-family:"JetBrains Mono",monospace; font-size:14px; font-weight:700; padding:13px 22px; border-radius:999px; transition:transform .2s, box-shadow .3s, border-color .2s, color .2s; }
.pp-btn.primary{ background:var(--pp-lime); color:#08130c; box-shadow:0 0 0 0 rgba(155,209,88,.5); }
.pp-btn.primary:hover{ transform:translateY(-2px); box-shadow:0 12px 28px -10px rgba(155,209,88,.7); }
.pp-btn.ghost{ border:1px solid var(--pp-line-strong); color:var(--pp-cream); }
.pp-btn.ghost:hover{ border-color:var(--pp-lime); color:var(--pp-lime); }

.pp-hero-stage{ display:flex; justify-content:center; position:relative; }
.pp-hero-cap{ position:absolute; bottom:-6px; left:50%; transform:translateX(-50%); white-space:nowrap;
  font-family:"JetBrains Mono",monospace; font-size:12px; color:var(--pp-dim); letter-spacing:.04em; }

/* ============================ PHONE MOCK ============================ */
.device{
  --screen-ar:945/2048;
  position:relative; width:clamp(248px,30vw,310px); flex:none;
  background:linear-gradient(155deg,#222a25,#0a0d0b);
  border-radius:46px; padding:11px;
  box-shadow:0 40px 80px -30px rgba(0,0,0,.85), 0 0 0 1px rgba(255,255,255,.07), inset 0 0 0 2px rgba(255,255,255,.04);
}
.device::before{ /* dynamic island */
  content:""; position:absolute; top:21px; left:50%; transform:translateX(-50%);
  width:88px; height:24px; background:#05080699; border-radius:14px; z-index:4; }
.device .screen{
  position:relative; aspect-ratio:var(--screen-ar); border-radius:36px; overflow:hidden;
  background:#13251b;
}
.device .screen img{ width:100%; height:100%; object-fit:cover; object-position:top center; display:block; }
/* video: native 1080x1920 with a 144px black bar baked on the RIGHT (content = left 936px).
   Screen aspect = 936/1920. Video box is widened to 1080/936 (115.385%) of the screen and left-pinned,
   so the bar overflows the right edge and is clipped. width is explicit (not auto) to ignore the file's
   pixel-aspect flag; object-fit:fill is exact because the box keeps the native 1080:1920 ratio. */
.device.video{ --screen-ar:936/1920; }
.device.video .screen video{ position:absolute; top:0; left:0; height:100%; width:115.385%; object-fit:fill; display:block; }
.device .glare{ position:absolute; inset:0; z-index:3; pointer-events:none; border-radius:36px;
  background:linear-gradient(125deg, rgba(255,255,255,.10) 0%, rgba(255,255,255,0) 30%, rgba(255,255,255,0) 70%, rgba(255,255,255,.05) 100%); }
.device .btn-pow{ position:absolute; right:-3px; top:150px; width:3px; height:64px; border-radius:3px; background:#2a322c; }
.device .btn-vol{ position:absolute; left:-3px; top:120px; width:3px; height:44px; border-radius:3px; background:#2a322c; }
.device .btn-vol.two{ top:176px; height:44px; }

/* floating tilt for feature devices */
.device.tilt-l{ transform:rotate(-3deg); }
.device.tilt-r{ transform:rotate(3deg); }

/* ---- hero + nav: collapse to one centred column on phones ---- */
@media (max-width:760px){
  .pp-hero{ grid-template-columns:1fr; gap:34px; text-align:center; padding-top:calc(var(--navh) + 36px); }
  .pp-hero-copy{ order:1; }
  .pp-hero-stage{ order:2; }
  .pp-eyebrow{ justify-content:center; }
  .pp-sub, .pp-lead{ max-width:38ch; margin-left:auto; margin-right:auto; }
  .pp-meta, .pp-cta{ justify-content:center; }
  .pp-hero-glow{ display:none; }
}
@media (max-width:560px){
  /* keep only the back link + GitHub button in the bar so it never overflows */
  .pp-nav-right a:not(.gh){ display:none; }
}

/* ============================ SECTIONS ============================ */
.pp-section{ max-width:var(--maxw); margin:0 auto; padding:clamp(56px,9vh,104px) clamp(18px,4vw,40px); }
.pp-sec-head{ margin-bottom:46px; max-width:60ch; }
.pp-h2{ font-size:clamp(28px,4vw,46px); font-weight:800; line-height:1.05; letter-spacing:-.02em; margin:14px 0 0; text-wrap:balance; }
.pp-h2 .g{ background:var(--pp-grad); -webkit-background-clip:text; background-clip:text; color:transparent; }
.pp-p{ font-size:clamp(16px,1.7vw,18px); line-height:1.65; color:var(--pp-dim); }
.pp-p .hl{ color:var(--pp-cream); }

/* concept row */
.pp-concepts{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:8px; }
.pp-concept{ border:1px solid var(--pp-line); border-radius:18px; padding:26px 24px; background:var(--pp-card); }
.pp-concept .ic{ font-size:26px; }
.pp-concept h3{ font-size:20px; margin:14px 0 6px; font-weight:700; }
.pp-concept p{ margin:0; font-size:14.5px; color:var(--pp-dim); line-height:1.55; }
.pp-concept:nth-child(1) .ic{ filter:hue-rotate(0); }
@media (max-width:720px){ .pp-concepts{ grid-template-columns:1fr; } }

/* spotlight (living window) */
.pp-spot{ background:
    radial-gradient(90% 120% at 85% 0%, rgba(244,194,87,.14), transparent 55%),
    linear-gradient(180deg,var(--pp-bg2),var(--pp-bg)); border-top:1px solid var(--pp-line); border-bottom:1px solid var(--pp-line); }
.pp-spot-inner{ max-width:var(--maxw); margin:0 auto; padding:clamp(64px,10vh,120px) clamp(18px,4vw,40px);
  display:grid; grid-template-columns:.9fr 1.1fr; gap:clamp(32px,6vw,80px); align-items:center; }
.pp-spot-stage{ display:flex; justify-content:center; }
@media (max-width:860px){ .pp-spot-inner{ grid-template-columns:1fr; } .pp-spot-stage{ order:-1; } }

/* feature rows */
.pp-feat{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(32px,6vw,84px); align-items:center; margin-top:clamp(64px,9vh,110px); }
.pp-feat:first-of-type{ margin-top:0; }
.pp-feat .stage{ display:flex; justify-content:center; }
.pp-feat.rev .copy{ order:2; }
.pp-feat.rev .stage{ order:1; }
.pp-kicker{ font-family:"JetBrains Mono",monospace; font-size:12.5px; letter-spacing:.16em; text-transform:uppercase; color:var(--pp-lime); margin:0 0 12px; }
.pp-feat h3{ font-size:clamp(24px,3vw,34px); font-weight:800; letter-spacing:-.02em; line-height:1.08; margin:0 0 14px; }
.pp-feat p{ font-size:16px; line-height:1.6; color:var(--pp-dim); margin:0 0 16px; }
.pp-feat .tags{ display:flex; flex-wrap:wrap; gap:8px; }
.pp-feat .tags span{ font-family:"JetBrains Mono",monospace; font-size:12px; color:var(--pp-dim); border:1px solid var(--pp-line); padding:5px 11px; border-radius:8px; }
@media (max-width:780px){
  .pp-feat{ grid-template-columns:1fr; gap:30px; }
  .pp-feat .copy, .pp-feat .stage, .pp-feat.rev .copy, .pp-feat.rev .stage{ order:0; }
  .pp-feat .stage{ margin-bottom:4px; }
  .device.tilt-l, .device.tilt-r{ transform:none; }
}

/* stack / close */
.pp-stack{ display:grid; grid-template-columns:1.1fr .9fr; gap:clamp(32px,6vw,72px); }
.pp-stack-list{ display:flex; flex-wrap:wrap; gap:10px; align-content:flex-start; }
.pp-stack-list span{ font-family:"JetBrains Mono",monospace; font-size:13px; padding:8px 14px; border-radius:9px; border:1px solid var(--pp-line); color:var(--pp-cream); background:var(--pp-card); }
.pp-facts{ display:flex; flex-direction:column; border-top:1px solid var(--pp-line); }
.pp-fact{ display:flex; justify-content:space-between; gap:18px; padding:14px 0; border-bottom:1px solid var(--pp-line); font-family:"JetBrains Mono",monospace; font-size:14px; }
.pp-fact .k{ color:var(--pp-dim); } .pp-fact .v{ color:var(--pp-cream); text-align:right; }
@media (max-width:720px){ .pp-stack{ grid-template-columns:1fr; } }

/* closing CTA */
.pp-close{ text-align:center; border-top:1px solid var(--pp-line);
  background:radial-gradient(80% 120% at 50% 0%, rgba(155,209,88,.10), transparent 60%); }
.pp-close .pp-h2{ margin-bottom:26px; }
.pp-close-row{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }

.pp-footer{ border-top:1px solid var(--pp-line); padding:26px clamp(18px,4vw,40px); display:flex; justify-content:space-between; flex-wrap:wrap; gap:14px;
  font-family:"JetBrains Mono",monospace; font-size:12.5px; color:var(--pp-faint); }
.pp-footer a{ color:var(--pp-dim); } .pp-footer a:hover{ color:var(--pp-cream); }

/* reveal */
.rev-in{ opacity:0; transform:translateY(26px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.rev-in.vis{ opacity:1; transform:none; }
@media (prefers-reduced-motion:reduce){ html{ scroll-behavior:auto; } .rev-in{ opacity:1; transform:none; transition:none; } }