/* =====================================================================
   Bhavesh Mapara — Portfolio design system
   Dark-first, theme-aware. Hand-editable. No build step required.
   ===================================================================== */

:root{
  /* surfaces */
  --bg-primary:#0a0a0f; --bg-secondary:#111118; --bg-tertiary:#1a1a24;
  --bg-card:#14141e; --bg-card-hover:#1c1c2a; --bg-glass:rgba(20,20,30,.7);
  /* text */
  --text-primary:#f0f0f5; --text-secondary:#a0a0b8; --text-tertiary:#6b6b80; --text-muted:#4a4a5c;
  /* accent */
  --accent-primary:#3b82f6; --accent-secondary:#6366f1; --accent-tertiary:#8b5cf6;
  --accent-gradient:linear-gradient(135deg,#3b82f6,#6366f1,#8b5cf6);
  --accent-glow:rgba(59,130,246,.15); --accent-glow-strong:rgba(59,130,246,.3);
  --success:#22c55e; --warning:#f59e0b;
  /* borders */
  --border-color:rgba(255,255,255,.06); --border-hover:rgba(255,255,255,.12); --border-accent:rgba(59,130,246,.3);
  /* type */
  --font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Fira Code",ui-monospace,monospace;
  /* scale */
  --radius-sm:6px; --radius-md:10px; --radius-lg:16px; --radius-xl:24px; --radius-full:9999px;
  --shadow-md:0 4px 12px rgba(0,0,0,.4); --shadow-lg:0 8px 32px rgba(0,0,0,.5); --shadow-glow:0 0 40px rgba(59,130,246,.12);
  --max-width:1180px; --header-height:70px;
  --transition:.25s ease;
}
:root[data-theme="light"]{
  --bg-primary:#f7f8fb; --bg-secondary:#eef1f6; --bg-tertiary:#e6eaf2;
  --bg-card:#ffffff; --bg-card-hover:#ffffff; --bg-glass:rgba(255,255,255,.75);
  --text-primary:#12131a; --text-secondary:#454a5c; --text-tertiary:#6b7180; --text-muted:#8b90a0;
  --border-color:rgba(10,12,30,.09); --border-hover:rgba(10,12,30,.16); --border-accent:rgba(59,130,246,.4);
  --shadow-md:0 4px 14px rgba(20,30,60,.08); --shadow-lg:0 12px 40px rgba(20,30,60,.12); --shadow-glow:0 0 40px rgba(59,130,246,.12);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans); background:var(--bg-primary); color:var(--text-primary);
  line-height:1.65; font-size:16px; overflow-x:hidden; letter-spacing:-.011em;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  transition:background .3s ease,color .3s ease;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent-glow-strong);color:var(--text-primary)}

.container{max-width:var(--max-width);margin:0 auto;padding:0 24px;width:100%}
.section{padding:96px 0;position:relative}
.section-sm{padding:64px 0}
.center{text-align:center}
.muted{color:var(--text-secondary)}
.accent-text{background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* ---------- typography ---------- */
h1,h2,h3,h4{line-height:1.15;font-weight:700;letter-spacing:-.02em}
h1{font-size:clamp(2.2rem,5vw,3.6rem)}
h2{font-size:clamp(1.7rem,3.5vw,2.6rem)}
h3{font-size:clamp(1.2rem,2vw,1.5rem)}
.kicker{font-family:var(--font-mono);font-size:.72rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--accent-primary);margin-bottom:14px;display:inline-block}
.section-title{margin-bottom:16px}
.section-intro{color:var(--text-secondary);max-width:640px;font-size:1.06rem}
.center .section-intro{margin-left:auto;margin-right:auto}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:var(--radius-md);font-weight:600;font-size:.94rem;cursor:pointer;border:1px solid transparent;transition:var(--transition);white-space:nowrap}
.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:0 4px 20px var(--accent-glow-strong)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px var(--accent-glow-strong)}
.btn-secondary{background:var(--bg-card);color:var(--text-primary);border-color:var(--border-hover)}
.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--border-accent);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--text-secondary);border-color:var(--border-color)}
.btn-ghost:hover{color:var(--text-primary);border-color:var(--border-hover)}
.btn-lg{padding:16px 32px;font-size:1rem}

/* ---------- header ---------- */
.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);z-index:100;display:flex;align-items:center;background:var(--bg-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border-color);transition:var(--transition)}
.header .container{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:1.12rem;letter-spacing:-.02em}
.logo .dot{width:10px;height:10px;border-radius:3px;background:var(--accent-gradient);box-shadow:0 0 12px var(--accent-glow-strong)}
.logo b{color:var(--accent-primary)}
.nav{display:flex;align-items:center;gap:4px}
.nav a{padding:8px 14px;border-radius:var(--radius-sm);font-size:.92rem;color:var(--text-secondary);font-weight:500;transition:var(--transition);position:relative}
.nav a:hover{color:var(--text-primary)}
.nav a.active{color:var(--text-primary)}
.nav a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--accent-gradient)}
.header-actions{display:flex;align-items:center;gap:10px}
.theme-toggle{width:38px;height:38px;border-radius:var(--radius-sm);border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-secondary);cursor:pointer;font-size:1rem;display:grid;place-items:center;transition:var(--transition)}
.theme-toggle:hover{color:var(--text-primary);border-color:var(--border-hover)}
.menu-btn{display:none;width:40px;height:40px;border-radius:var(--radius-sm);border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-primary);cursor:pointer;font-size:1.2rem}
.mobile-nav{display:none;position:fixed;top:var(--header-height);left:0;right:0;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);padding:16px 24px;flex-direction:column;gap:4px;z-index:99}
.mobile-nav.open{display:flex}
.mobile-nav a{padding:12px 14px;border-radius:var(--radius-sm);color:var(--text-secondary);font-weight:500}
.mobile-nav a:hover{background:var(--bg-card);color:var(--text-primary)}

/* ---------- hero ---------- */
.hero{position:relative;min-height:calc(100vh - var(--header-height));display:flex;align-items:center;padding:120px 0 80px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-bg .orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.5}
.hero-bg .orb1{width:500px;height:500px;background:radial-gradient(circle,rgba(59,130,246,.35),transparent 70%);top:-120px;right:-80px}
.hero-bg .orb2{width:420px;height:420px;background:radial-gradient(circle,rgba(139,92,246,.28),transparent 70%);bottom:-140px;left:-100px}
.hero-bg .grid-lines{position:absolute;inset:0;background-image:linear-gradient(var(--border-color) 1px,transparent 1px),linear-gradient(90deg,var(--border-color) 1px,transparent 1px);background-size:64px 64px;mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,#000,transparent);-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,#000,transparent);opacity:.5}
.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1.35fr .9fr;gap:56px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:var(--radius-full);border:1px solid var(--border-accent);background:var(--accent-glow);font-size:.82rem;font-weight:500;color:var(--text-secondary);margin-bottom:24px}
.hero-badge .pulse{width:7px;height:7px;border-radius:50%;background:var(--accent-primary);box-shadow:0 0 0 0 var(--accent-glow-strong);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 var(--accent-glow-strong)}70%{box-shadow:0 0 0 8px transparent}100%{box-shadow:0 0 0 0 transparent}}
.hero h1{margin-bottom:22px}
.hero-sub{font-size:1.16rem;color:var(--text-secondary);margin-bottom:14px;font-weight:500}
.hero-meta{font-family:var(--font-mono);font-size:.86rem;color:var(--text-tertiary);margin-bottom:30px;letter-spacing:-.01em}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-photo{position:relative;justify-self:center}
.hero-photo img{width:100%;max-width:340px;border-radius:var(--radius-xl);border:1px solid var(--border-hover);box-shadow:var(--shadow-lg)}
.hero-photo::after{content:"";position:absolute;inset:-2px;border-radius:calc(var(--radius-xl) + 2px);background:var(--accent-gradient);z-index:-1;opacity:.4;filter:blur(14px)}

/* ---------- stat strip ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:56px}
.stat{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:24px 20px;transition:var(--transition)}
.stat:hover{border-color:var(--border-accent);transform:translateY(-3px);box-shadow:var(--shadow-glow)}
.stat .num{font-size:1.9rem;font-weight:800;background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.03em}
.stat .lbl{font-weight:600;margin-top:4px;font-size:.95rem}
.stat .desc{color:var(--text-tertiary);font-size:.82rem;margin-top:2px}

/* ---------- generic cards / grid ---------- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:28px;transition:var(--transition)}
.card:hover{border-color:var(--border-hover);background:var(--bg-card-hover);transform:translateY(-3px)}
.card .icon{font-size:1.7rem;margin-bottom:14px;display:block}
.card h3{margin-bottom:8px;font-size:1.18rem}
.card p{color:var(--text-secondary);font-size:.95rem}
a.card{display:block}
a.card .more{color:var(--accent-primary);font-weight:600;font-size:.9rem;margin-top:14px;display:inline-flex;gap:6px;align-items:center}
.card-tag{display:inline-block;font-family:var(--font-mono);font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent-primary);border:1px solid var(--border-accent);border-radius:var(--radius-full);padding:3px 10px;margin-bottom:14px}

/* ---------- product case study ---------- */
.product{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:40px;margin-bottom:32px;position:relative;overflow:hidden}
.product::before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:var(--accent-gradient)}
.product-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:8px}
.product-head h3{font-size:1.55rem}
.product-role{font-family:var(--font-mono);font-size:.78rem;color:var(--text-tertiary)}
.product-tags{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0 24px}
.chip{font-size:.78rem;padding:5px 12px;border-radius:var(--radius-full);background:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-secondary)}
.pcs{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:8px}
.pcs .block h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;color:var(--accent-primary);margin-bottom:8px;font-family:var(--font-mono)}
.pcs .block p,.pcs .block li{color:var(--text-secondary);font-size:.94rem}
.pcs .block ul{list-style:none;display:flex;flex-direction:column;gap:6px}
.pcs .block li{padding-left:18px;position:relative}
.pcs .block li::before{content:"▹";position:absolute;left:0;color:var(--accent-primary)}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:24px}
.metric{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:16px;text-align:center}
.metric .m-num{font-size:1.4rem;font-weight:800;background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.metric .m-lbl{font-size:.76rem;color:var(--text-tertiary);margin-top:2px}
.disclaimer{font-size:.8rem;color:var(--text-muted);font-style:italic;margin-top:18px}

/* ---------- pills / skill bars ---------- */
.pill-row{display:flex;flex-wrap:wrap;gap:10px}
.pill{padding:9px 16px;border-radius:var(--radius-full);background:var(--bg-card);border:1px solid var(--border-color);font-size:.88rem;color:var(--text-secondary);transition:var(--transition)}
.pill:hover{border-color:var(--border-accent);color:var(--text-primary)}

/* ---------- pricing ---------- */
.pricing{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;max-width:900px;margin:0 auto}
.price-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:36px;position:relative;transition:var(--transition)}
.price-card.featured{border-color:var(--border-accent);box-shadow:var(--shadow-glow)}
.price-card.featured::before{content:"Most popular";position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--accent-gradient);color:#fff;font-size:.72rem;font-weight:700;letter-spacing:.05em;padding:5px 14px;border-radius:var(--radius-full)}
.price-card h3{font-size:1.3rem;margin-bottom:6px}
.price-card .tier-desc{color:var(--text-tertiary);font-size:.9rem;margin-bottom:20px;min-height:40px}
.price-card .amount{font-size:2.6rem;font-weight:800;letter-spacing:-.03em}
.price-card .amount small{font-size:1rem;font-weight:500;color:var(--text-tertiary)}
.price-card ul{list-style:none;margin:24px 0;display:flex;flex-direction:column;gap:11px}
.price-card li{padding-left:26px;position:relative;color:var(--text-secondary);font-size:.93rem}
.price-card li::before{content:"✓";position:absolute;left:0;color:var(--success);font-weight:700}
.price-card li.off{color:var(--text-muted)}
.price-card li.off::before{content:"—";color:var(--text-muted)}
.price-card .btn{width:100%;justify-content:center}

/* ---------- forms ---------- */
.form{display:flex;flex-direction:column;gap:16px;max-width:520px}
.field label{display:block;font-size:.85rem;font-weight:600;margin-bottom:6px;color:var(--text-secondary)}
.field input,.field textarea,.field select{width:100%;padding:13px 15px;border-radius:var(--radius-md);border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-primary);font-family:inherit;font-size:.95rem;transition:var(--transition)}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-glow)}
.field textarea{resize:vertical;min-height:120px}
.form-note{font-size:.82rem;color:var(--text-tertiary)}
.form-msg{padding:12px 16px;border-radius:var(--radius-md);font-size:.9rem;display:none}
.form-msg.show{display:block}
.form-msg.ok{background:rgba(34,197,94,.12);border:1px solid rgba(34,197,94,.3);color:var(--success)}
.form-msg.err{background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.3);color:#f87171}

/* ---------- misc sections ---------- */
.cta-band{background:linear-gradient(135deg,rgba(59,130,246,.12),rgba(139,92,246,.12));border:1px solid var(--border-accent);border-radius:var(--radius-xl);padding:56px 40px;text-align:center;margin:0 auto}
.cta-band h2{margin-bottom:14px}
.cta-band p{color:var(--text-secondary);max-width:520px;margin:0 auto 26px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.timeline{display:flex;flex-direction:column;gap:0}
.tl-item{display:grid;grid-template-columns:120px 1fr;gap:24px;padding:22px 0;border-top:1px solid var(--border-color)}
.tl-item .yr{font-family:var(--font-mono);font-size:.85rem;color:var(--accent-primary);font-weight:600}
.tl-item h4{margin-bottom:6px}
.tl-item p{color:var(--text-secondary);font-size:.94rem}
.tl-item .tags{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap}

/* ---------- lesson pages ---------- */
.breadcrumb{font-size:.85rem;color:var(--text-tertiary);margin-bottom:20px}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover{color:var(--accent-primary)}
.lesson-body{max-width:760px}
.lesson-body p{color:var(--text-secondary);margin-bottom:18px;font-size:1.02rem}
.lesson-body h2{margin:38px 0 14px}
.lesson-body h3{margin:26px 0 10px}
.callout{background:var(--bg-card);border:1px solid var(--border-color);border-left:3px solid var(--accent-primary);border-radius:var(--radius-md);padding:20px 24px;margin:24px 0}
.callout .lbl{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-primary);margin-bottom:8px}
.lesson-nav{display:flex;justify-content:space-between;gap:16px;margin-top:48px;padding-top:24px;border-top:1px solid var(--border-color);flex-wrap:wrap}

/* ---------- footer ---------- */
.footer{background:var(--bg-secondary);border-top:1px solid var(--border-color);padding:56px 0 28px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.footer-brand p{color:var(--text-tertiary);font-size:.9rem;margin-top:12px;max-width:280px}
.footer h5{font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-tertiary);margin-bottom:14px;font-family:var(--font-mono)}
.footer ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.footer a{color:var(--text-secondary);font-size:.92rem}
.footer a:hover{color:var(--accent-primary)}
.footer-bottom{border-top:1px solid var(--border-color);padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--text-muted);font-size:.85rem}

/* ---------- reveal animation (progressive enhancement: only hides when JS is active) ---------- */
.js .reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .reveal{opacity:1;transform:none;transition:none}.hero-badge .pulse{animation:none}}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .hero .container{grid-template-columns:1fr;gap:40px}
  .hero-photo{order:-1}.hero-photo img{max-width:240px}
  .split{grid-template-columns:1fr;gap:32px}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .pcs,.pricing{grid-template-columns:1fr}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav{display:none}.menu-btn{display:block}
  .section{padding:64px 0}
}
@media(max-width:520px){
  .grid-2,.grid-3,.grid-4,.stats{grid-template-columns:1fr}
  .tl-item{grid-template-columns:1fr;gap:6px}
  .product{padding:26px 22px}
  .footer-grid{grid-template-columns:1fr}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{justify-content:center}
}