/*
Theme Name: Pradeep Tech
Theme URI: https://pradeepgupta.co.in/
Author: Er Pradeep Gupta
Description: Lightweight, fast, responsive portfolio + CSE knowledge theme (blue/indigo tech style). No external fonts or frameworks.
Version: 1.0.0
Requires PHP: 7.4
License: GPLv2 or later
Text Domain: pradeep-tech
*/
:root{--ink:#0f172a;--ink2:#1e293b;--muted:#5b6478;--line:#e3e8f2;--bg:#f6f8fc;--card:#fff;--brand:#4f46e5;--brand2:#2563eb;--brand-d:#3730a3;--sky:#e0e7ff;--cyan:#06b6d4;--ok:#059669;--r:18px;--sh:0 18px 40px -26px rgba(30,41,99,.45);--max:1180px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Sans Devanagari",Arial,sans-serif;font-size:17px;line-height:1.7;color:var(--ink2);background:var(--bg)}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{color:var(--ink);line-height:1.25;margin:1.4em 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4.4vw,3rem);margin-top:0}
h2{font-size:clamp(1.4rem,2.8vw,1.9rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
code,pre,kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em}
code{background:#eef2ff;color:#3730a3;padding:.1em .4em;border-radius:6px}
pre{background:#0f172a;color:#e2e8f0;padding:18px 20px;border-radius:14px;overflow:auto;line-height:1.55}
pre code{background:none;color:inherit;padding:0}
table{width:100%;border-collapse:collapse;margin:1em 0 1.5em;font-size:.95rem;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 0 0 1px var(--line)}
th,td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:#eef2ff;color:var(--ink)}
.tbl{overflow-x:auto;-webkit-overflow-scrolling:touch}
blockquote{margin:1.2em 0;padding:14px 18px;border-left:4px solid var(--brand);background:#eef2ff;border-radius:0 12px 12px 0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:10px}
/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.6) blur(10px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:1.12rem;white-space:nowrap}
.logo:hover{text-decoration:none}
.logo b{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:.95rem;letter-spacing:.02em}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px;align-items:center}
.nav a{display:block;padding:8px 14px;border-radius:10px;color:var(--ink2);font-weight:600;font-size:.97rem}
.nav a:hover,.nav .current-menu-item>a,.nav .current-page-ancestor>a,.nav .current_page_parent>a{background:var(--sky);color:var(--brand-d);text-decoration:none}
.nav .menu-cta>a{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}
.nav .menu-cta>a:hover{color:#fff;filter:brightness(1.08)}
.navbtn{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:44px;height:44px;cursor:pointer;color:var(--ink)}
.navbtn span,.navbtn span:before,.navbtn span:after{display:block;width:20px;height:2px;background:currentColor;margin:auto;position:relative;content:"";transition:.2s}
.navbtn span:before{position:absolute;top:-6px}.navbtn span:after{position:absolute;top:6px}
@media (max-width:860px){
 .navbtn{display:block}
 .nav{position:absolute;left:0;right:0;top:68px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh);display:none}
 .nav.open{display:block}
 .nav ul{flex-direction:column;align-items:stretch;padding:10px 16px 16px;gap:2px}
 .nav a{padding:12px 14px}
}
/* hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(1000px 500px at 85% -10%,rgba(6,182,212,.35),transparent 60%),radial-gradient(900px 600px at -10% 120%,rgba(79,70,229,.55),transparent 60%),linear-gradient(135deg,#0b1026 0%,#1e1b4b 55%,#172554 100%);color:#e6e9ff}
.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:44px 44px;mask-image:linear-gradient(180deg,#000,transparent 85%)}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;padding-top:76px;padding-bottom:84px}
.hero h1{color:#fff;margin-bottom:.35em}
.hero h1 span{background:linear-gradient(90deg,#a5b4fc,#67e8f9);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:1.2rem;color:#c7d2fe;max-width:36em}
.badge{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:#e0e7ff;font-size:.88rem;font-weight:600;margin-bottom:18px}
.badge i{width:8px;height:8px;border-radius:50%;background:#34d399;box-shadow:0 0 0 4px rgba(52,211,153,.25)}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:12px;font-weight:700;border:0;cursor:pointer;font:inherit;font-weight:700;transition:transform .15s,box-shadow .15s}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-p{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 14px 28px -14px rgba(79,70,229,.9)}
.btn-g{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.25)}
.btn-o{background:#fff;color:var(--brand-d);border:1px solid var(--line)}
.hero-card{background:rgba(15,23,42,.55);border:1px solid rgba(165,180,252,.25);border-radius:20px;padding:22px;box-shadow:0 30px 60px -30px rgba(0,0,0,.6)}
.hero-card .dots{display:flex;gap:6px;margin-bottom:14px}.hero-card .dots i{width:11px;height:11px;border-radius:50%;background:#f87171}.hero-card .dots i:nth-child(2){background:#fbbf24}.hero-card .dots i:nth-child(3){background:#34d399}
.hero-card pre{background:transparent;padding:0;margin:0;color:#c7d2fe;font-size:.9rem;white-space:pre-wrap}
.hero-card .k{color:#f0abfc}.hero-card .s{color:#86efac}.hero-card .c{color:#64748b}.hero-card .f{color:#67e8f9}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr;padding-top:52px;padding-bottom:60px}.hero-card{order:2}}
/* sections */
.sec{padding:70px 0}
.sec.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-h{max-width:720px;margin:0 auto 34px;text-align:center}
.sec-h h2{margin:0 0 .3em}
.sec-h p{color:var(--muted);margin:0}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:8px}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:1000px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}.sec{padding:52px 0}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--sh);transition:transform .18s,box-shadow .18s;position:relative}
a.card{display:block;color:inherit}
a.card:hover{text-decoration:none;transform:translateY(-4px);box-shadow:0 26px 50px -28px rgba(30,41,99,.55)}
.card h3{margin:.2em 0 .35em;font-size:1.12rem}
.card p{color:var(--muted);margin:0;font-size:.97rem}
.card .ico{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;background:var(--sky);color:var(--brand-d);font-weight:800;font-size:1.05rem;margin-bottom:12px}
.card .more{display:inline-block;margin-top:12px;font-weight:700;color:var(--brand);font-size:.93rem}
.proj{padding:0;overflow:hidden}
.proj img{width:100%;aspect-ratio:7/5;object-fit:cover;background:#e0e7ff}
.proj .in{padding:18px 20px 22px}
.tag{display:inline-block;font-size:.75rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--brand);background:var(--sky);padding:3px 10px;border-radius:999px;margin-bottom:6px}
.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:center}
.split img{border-radius:22px;box-shadow:var(--sh);width:100%;aspect-ratio:7/6;object-fit:cover}
.split.even{grid-template-columns:1fr 1fr;align-items:start}
.split>*,.grid>*{min-width:0}
@media (max-width:860px){.split,.split.even{grid-template-columns:1fr;gap:28px}}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:24px 0}
.stats div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;text-align:center}
.stats b{display:block;font-size:1.35rem;color:var(--brand-d)}
.stats span{font-size:.85rem;color:var(--muted)}
@media (max-width:640px){.stats{grid-template-columns:repeat(2,1fr)}}
.chk{list-style:none;padding:0;margin:0 0 1em}
.chk li{position:relative;padding-left:30px;margin:.45em 0}
.chk li:before{content:"✓";position:absolute;left:0;top:0;color:#fff;background:var(--ok);width:20px;height:20px;border-radius:50%;display:grid;place-items:center;font-size:.75rem;font-weight:800;margin-top:4px}
.quote{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--sh)}
.quote .stars{color:#f59e0b;letter-spacing:2px;font-size:1.1rem}
.quote p{font-size:1.02rem;color:var(--ink2);margin:.6em 0 1em}
.quote cite{font-style:normal;font-weight:800;color:var(--ink)}
.quote cite small{display:block;font-weight:500;color:var(--muted)}
.cta{background:linear-gradient(135deg,#1e1b4b,#1d4ed8);color:#e0e7ff;border-radius:24px;padding:40px;display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.cta h2{color:#fff;margin:0 0 .2em}.cta p{margin:0}
/* page */
.phead{background:linear-gradient(135deg,#0b1026,#1e1b4b 60%,#1e3a8a);color:#c7d2fe;padding:54px 0 46px}
.phead h1{color:#fff;margin:0 0 .25em}
.phead p{margin:0;max-width:46em;font-size:1.08rem}
.crumbs{font-size:.88rem;margin-bottom:10px;color:#a5b4fc}.crumbs a{color:#c7d2fe}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:36px;padding:44px 0 70px}
.layout.full{grid-template-columns:minmax(0,1fr)}
.content{background:#fff;border:1px solid var(--line);border-radius:22px;padding:36px 40px;box-shadow:var(--sh);min-width:0}
.layout.full .content{background:none;border:0;box-shadow:none;padding:0}
.layout.full .content h2{border-top:0;padding-top:0}
.content>*:first-child{margin-top:0}
.content h2{padding-top:.2em;border-top:1px solid var(--line);padding-top:1em}
.content h2:first-child{border-top:0;padding-top:0}
.content ul,.content ol{padding-left:1.3em}
.content li{margin:.3em 0}
.hindi{background:#ecfeff;border:1px solid #a5f3fc;color:#155e75;border-radius:14px;padding:12px 16px;font-size:.98rem}
.note{background:#fffbeb;border:1px solid #fde68a;border-radius:14px;padding:12px 16px;font-size:.96rem}
.side{position:sticky;top:90px;align-self:start}
.side .box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--sh)}
.side h3{margin:0 0 10px;font-size:1rem}
.side ol{margin:0;padding-left:1.4em;font-size:.93rem}
.side li{margin:.2em 0}
.side a{color:var(--ink2)}
.side .cur>a{color:var(--brand);font-weight:800}
.pn{display:flex;justify-content:space-between;gap:12px;margin-top:34px;flex-wrap:wrap}
.pn a{flex:1 1 240px;border:1px solid var(--line);border-radius:14px;padding:12px 16px;background:#f8faff;font-weight:700}
.pn a small{display:block;color:var(--muted);font-weight:500}
.pn .nx{text-align:right}
@media (max-width:980px){.layout{grid-template-columns:minmax(0,1fr)}.side{position:static}}
@media (max-width:640px){.content{padding:22px 18px;border-radius:16px}body{font-size:16px}.cta{padding:28px 22px}}
/* form */
.pgf{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:var(--sh);scroll-margin-top:100px}
.pgf .row{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.pgf label{display:block;font-weight:700;font-size:.93rem;margin-bottom:6px;color:var(--ink)}
.pgf p{margin:0 0 14px}
.pgf input[type=text],.pgf input[type=email],.pgf textarea{width:100%;padding:12px 14px;border:1.5px solid #c7d2fe;border-radius:12px;font:inherit;background:#f8faff;color:inherit}
.pgf input:focus,.pgf textarea:focus{outline:0;border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(79,70,229,.15)}
.pgf textarea{min-height:130px;resize:vertical}
.pgf .hp{position:absolute!important;left:-9999px!important;height:1px;width:1px;overflow:hidden}
.alert{padding:12px 16px;border-radius:12px;margin-bottom:14px;font-weight:600}
.alert.ok{background:#ecfdf5;color:#065f46;border-left:4px solid var(--ok)}
.alert.err{background:#fef2f2;color:#991b1b;border-left:4px solid #dc2626}
@media (max-width:640px){.pgf .row{grid-template-columns:1fr}.pgf .btn{width:100%;justify-content:center}}
/* footer */
.ftr{background:#0b1026;color:#a5b4fc;padding:50px 0 26px;margin-top:0}
.ftr .cols{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:30px}
.ftr h4{color:#fff;margin:0 0 10px;font-size:1rem}
.ftr a{color:#c7d2fe}
.ftr ul{list-style:none;padding:0;margin:0;font-size:.95rem}
.ftr li{margin:.3em 0}
.ftr .copy{border-top:1px solid rgba(165,180,252,.18);margin-top:30px;padding-top:18px;font-size:.88rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
@media (max-width:760px){.ftr .cols{grid-template-columns:1fr}}
.screen-reader-text{position:absolute!important;clip:rect(1px,1px,1px,1px);width:1px;height:1px;overflow:hidden}
:focus-visible{outline:3px solid #818cf8;outline-offset:2px}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}