:root {
  --bg: #09090f;
  --surface: #111118;
  --surface2: #18181f;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.14);
  --accent: #5b8df8;
  --accent2: #a78bfa;
  --accent3: #34d399;
  --text: #f0f0f5;
  --text-muted: #8888a0;
  --text-dim: #454558;
  --font-display: 'Syne', sans-serif;
  --font-body: 'Inter', sans-serif;
  --r: 14px;
  --r-sm: 8px;
  --ease: 0.3s cubic-bezier(.4,0,.2,1);
}
[data-theme="light"] {
  --bg: #f4f4f9; --surface: #ffffff; --surface2: #ededf5;
  --border: rgba(0,0,0,0.07); --border-strong: rgba(0,0,0,0.13);
  --accent: #3b6ef0; --accent2: #7c3aed; --accent3: #059669;
  --text: #0a0a14; --text-muted: #4a4a68; --text-dim: #9898b8;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:16px;line-height:1.65;overflow-x:hidden}
a{color:var(--accent);text-decoration:none}
img{max-width:100%;border-radius:var(--r)}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(9,9,15,0.85);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:0 clamp(16px,4vw,56px);display:flex;align-items:center;justify-content:space-between;height:64px}
[data-theme="light"] nav{background:rgba(244,244,249,0.88)}
.nav-logo{font-family:var(--font-display);font-size:20px;font-weight:800;color:var(--text);letter-spacing:-0.5px}
.nav-logo span{color:var(--accent)}
.nav-back{display:inline-flex;align-items:center;gap:8px;color:var(--text-muted);font-size:14px;font-weight:500;transition:color var(--ease)}
.nav-back:hover{color:var(--accent)}
.theme-btn{background:var(--surface2);border:1px solid var(--border);color:var(--text-muted);border-radius:50%;width:36px;height:36px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:15px;transition:all var(--ease)}
.theme-btn:hover{border-color:var(--accent);color:var(--text)}

/* HERO BANNER */
.proj-hero-banner{min-height:76vh;display:flex;align-items:flex-end;position:relative;overflow:hidden;padding:100px clamp(16px,5vw,72px) 0}
.banner-bg{position:absolute;inset:0;z-index:0}
.banner-gradient{position:absolute;inset:0;z-index:1}
.banner-noise{position:absolute;inset:0;z-index:2;opacity:.03;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.banner-content{position:relative;z-index:3;max-width:1100px;margin:0 auto;width:100%;padding-bottom:0}
.proj-cat-pill{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(255,255,255,0.2);border-radius:100px;padding:6px 16px;font-size:12px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;margin-bottom:20px;backdrop-filter:blur(8px);color:#fff}
.banner-title{font-family:var(--font-display);font-size:clamp(28px,4.5vw,58px);font-weight:800;letter-spacing:-2px;line-height:1.05;color:#fff;margin-bottom:20px;max-width:860px}
.banner-sub{font-size:17px;color:rgba(255,255,255,0.72);max-width:680px;line-height:1.72;margin-bottom:36px}

/* STAT STRIP */
.stat-strip{position:relative;z-index:3;max-width:1100px;margin:0 auto;width:100%;display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:0;background:rgba(255,255,255,0.06);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,0.12);border-radius:var(--r);overflow:hidden;margin-top:40px}
.stat-item{padding:22px 24px;border-right:1px solid rgba(255,255,255,0.08);position:relative}
.stat-item:last-child{border-right:none}
.stat-num{font-family:var(--font-display);font-size:28px;font-weight:800;color:#fff;letter-spacing:-1px;line-height:1}
.stat-unit{font-size:14px;color:rgba(255,255,255,0.5);margin-top:4px;font-weight:500}

/* MAIN LAYOUT */
.proj-wrap{max-width:1100px;margin:0 auto;padding:64px clamp(16px,5vw,72px) 80px;display:grid;grid-template-columns:1fr 320px;gap:52px;align-items:start}
@media(max-width:860px){.proj-wrap{grid-template-columns:1fr}}

/* CONTENT BLOCKS */
.sec-label{display:inline-flex;align-items:center;gap:8px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1.8px;color:var(--accent);margin-bottom:10px}
.sec-label::before{content:'';width:18px;height:2px;background:var(--accent);border-radius:2px}
.sec-title{font-family:var(--font-display);font-size:clamp(20px,2.5vw,30px);font-weight:800;letter-spacing:-0.8px;margin-bottom:16px;line-height:1.15}
.prose p{color:var(--text-muted);line-height:1.82;font-size:15.5px;margin-bottom:14px}
.prose p:last-child{margin-bottom:0}
.prose p strong{color:var(--text)}
.content-block{margin-bottom:56px}

/* BEFORE / AFTER */
.ba-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}
.ba-card{border-radius:var(--r);padding:22px}
.ba-card.before{background:rgba(220,38,38,0.07);border:1px solid rgba(220,38,38,0.18)}
.ba-card.after{background:rgba(52,211,153,0.07);border:1px solid rgba(52,211,153,0.18)}
.ba-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;margin-bottom:10px}
.ba-card.before .ba-label{color:#f87171}
.ba-card.after .ba-label{color:var(--accent3)}
.ba-card p{font-size:14px;color:var(--text-muted);line-height:1.65}

/* PROCESS STEPS */
.steps{display:flex;flex-direction:column;gap:0;margin-top:20px;position:relative}
.steps::before{content:'';position:absolute;left:19px;top:20px;bottom:20px;width:2px;background:linear-gradient(to bottom,var(--accent),var(--accent2));opacity:.3;border-radius:2px}
.step{display:flex;gap:20px;padding:20px 0;position:relative}
.step-dot{width:40px;height:40px;border-radius:50%;background:var(--surface2);border:2px solid var(--border-strong);display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-size:14px;font-weight:800;color:var(--accent);flex-shrink:0;z-index:1;transition:all var(--ease)}
.step:hover .step-dot{background:var(--accent);color:#fff;border-color:var(--accent)}
.step-body h4{font-size:15px;font-weight:700;margin-bottom:5px}
.step-body p{font-size:13.5px;color:var(--text-muted);line-height:1.65}

/* TECH STACK */
.tech-wrap{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.tech-tag{display:inline-flex;align-items:center;gap:7px;background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--r-sm);padding:8px 14px;font-size:13px;font-weight:600;color:var(--text);transition:border-color var(--ease)}
.tech-tag:hover{border-color:var(--accent);color:var(--accent)}
.tech-tag em{font-style:normal;font-size:16px}

/* RESULTS */
.results{display:flex;flex-direction:column;gap:12px;margin-top:16px}
.result-row{display:flex;gap:14px;align-items:flex-start;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-sm);padding:16px 18px;transition:border-color var(--ease)}
.result-row:hover{border-color:var(--accent3)}
.result-check{font-size:16px;flex-shrink:0;margin-top:1px}
.result-text{font-size:14px;color:var(--text-muted);line-height:1.65}
.result-text strong{color:var(--accent3)}

/* SIDEBAR */
.sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:84px}
.side-card{background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--r);padding:22px;overflow:hidden}
.side-card-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;color:var(--text-dim);margin-bottom:14px}
.meta-row{display:flex;flex-direction:column;gap:3px;margin-bottom:14px}
.meta-row:last-child{margin-bottom:0}
.meta-key{font-size:11px;color:var(--text-dim);font-weight:600;text-transform:uppercase;letter-spacing:0.8px}
.meta-val{font-size:14px;font-weight:600;color:var(--text)}
.impact-highlight{background:linear-gradient(135deg,var(--surface),var(--surface2));border:1px solid var(--border-strong);border-radius:var(--r);padding:22px;position:relative;overflow:hidden}
.impact-highlight::before{content:'';position:absolute;top:-40px;right:-40px;width:120px;height:120px;background:radial-gradient(circle,var(--accent-glow,rgba(91,141,248,.15)) 0%,transparent 70%)}
.impact-num{font-family:var(--font-display);font-size:40px;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.impact-desc{font-size:13px;color:var(--text-muted);margin-top:6px;line-height:1.5}
.career-note{background:linear-gradient(135deg,rgba(167,139,250,.08),rgba(91,141,248,.08));border:1px solid rgba(167,139,250,.2);border-radius:var(--r);padding:20px;font-size:13.5px;color:var(--text-muted);line-height:1.7}
.career-note strong{color:var(--accent2)}

/* PROJ NAV */
.proj-nav-bar{border-top:1px solid var(--border);padding:32px clamp(16px,5vw,72px);display:flex;gap:16px;justify-content:space-between;max-width:1244px;margin:0 auto}
.pnav-btn{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--r);padding:16px 22px;transition:all var(--ease);color:var(--text);flex:1;max-width:46%}
.pnav-btn:hover{border-color:var(--accent);transform:translateY(-2px)}
.pnav-btn.next{justify-content:flex-end;text-align:right}
.pnav-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-dim);display:block;margin-bottom:3px}
.pnav-title{font-size:13.5px;font-weight:700}
.pnav-arrow{font-size:20px;color:var(--text-dim);flex-shrink:0}

/* SCROLL REVEAL */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}

/* PLACEHOLDER */
.img-ph{background:var(--surface2);border:1px dashed var(--border-strong);border-radius:var(--r);height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:var(--text-dim);font-size:13px;margin:20px 0}
.img-ph-icon{font-size:32px;opacity:.35}

@media(max-width:700px){.ba-grid{grid-template-columns:1fr}.stat-strip{grid-template-columns:1fr 1fr}.pnav-btn{max-width:100%}.proj-nav-bar{flex-direction:column}}