/* ============================================================
   V.S.S. Pratap Reddy Mukku — author site
   Shared styles (cross-browser, responsive)
   ============================================================ */

:root{
  --paper:#F2F0FA;
  --paper-2:#FBFAFE;
  --ink:#1B1733;
  --ink-soft:#4F4A6B;
  --indigo:#4733B0;
  --indigo-deep:#2E2173;
  --amber:#F2A340;
  --amber-deep:#CF7C20;
  --teal:#1F9E94;
  --line:rgba(27,23,51,0.12);
  --shadow:0 18px 40px -24px rgba(46,33,115,0.45);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Newsreader",Georgia,"Times New Roman",serif;
  font-size:18px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
body::before{
  content:"";position:fixed;top:-30%;right:-10%;width:680px;height:680px;border-radius:50%;
  background:radial-gradient(circle at center, rgba(71,51,176,0.16), rgba(71,51,176,0) 62%);
  z-index:-1;pointer-events:none;
}
body::after{
  content:"";position:fixed;bottom:-25%;left:-12%;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle at center, rgba(242,163,64,0.14), rgba(242,163,64,0) 62%);
  z-index:-1;pointer-events:none;
}
a{color:inherit;}
img{max-width:100%;display:block;}

.wrap{
  width:100%;max-width:1080px;margin:0 auto;
  padding-left:max(28px, env(safe-area-inset-left));
  padding-right:max(28px, env(safe-area-inset-right));
}
@media (min-width:768px){
  .wrap{padding-left:48px;padding-right:48px;}
}
.mono{font-family:"JetBrains Mono",ui-monospace,"Courier New",monospace;}
h1,h2,h3,h4{font-family:"Bricolage Grotesque","Segoe UI",sans-serif;line-height:1.08;margin:0;}

/* ---------- top navigation ---------- */
.site-head{position:sticky;top:0;z-index:50;background:rgba(242,240,250,0.82);
  backdrop-filter:saturate(180%) blur(10px);-webkit-backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;min-height:64px;}
.brand{font-family:"JetBrains Mono",monospace;font-weight:600;font-size:15px;color:var(--ink);
  text-decoration:none;letter-spacing:-0.01em;}
.brand b{color:var(--indigo);font-weight:600;}
.nav-links{display:flex;gap:6px;align-items:center;}
.nav-links a{
  font-family:"JetBrains Mono",monospace;font-size:14px;color:var(--ink-soft);
  text-decoration:none;padding:8px 14px;border-radius:9px;transition:color .2s,background .2s;
}
.nav-links a:hover{color:var(--indigo);background:rgba(71,51,176,0.07);}
.nav-links a.active{color:var(--indigo);font-weight:600;}
.nav-toggle{
  display:none;background:none;border:1.5px solid var(--line);border-radius:9px;
  width:42px;height:38px;cursor:pointer;align-items:center;justify-content:center;padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative;transition:.2s;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);transition:.2s;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg);}

/* ---------- page shell ---------- */
main{flex:1 0 auto;}
.page{padding-top:60px;padding-bottom:60px;}
.eyebrow{font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--indigo);margin:0 0 12px;font-weight:500;}
.page-title{font-size:clamp(32px,5vw,52px);font-weight:700;letter-spacing:-0.02em;}
.page-title .hl{color:var(--indigo);}
.lead{font-size:clamp(18px,2.4vw,21px);color:var(--ink-soft);max-width:58ch;margin:22px 0 0;}

/* ---------- home hero ---------- */
.hero{padding-top:64px;padding-bottom:44px;}
.code-greet{font-family:"JetBrains Mono",monospace;font-size:clamp(15px,2.4vw,19px);color:var(--indigo-deep);margin-bottom:24px;}
.code-greet .kw{color:var(--amber-deep);}
.code-greet .mod{color:var(--ink);font-weight:600;}
.cursor{display:inline-block;width:9px;height:1.05em;background:var(--indigo);margin-left:3px;vertical-align:-2px;animation:blink 1.1s steps(1) infinite;}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.btn{font-family:"JetBrains Mono",monospace;font-size:14.5px;font-weight:500;text-decoration:none;
  padding:13px 22px;border-radius:11px;display:inline-flex;align-items:center;gap:9px;cursor:pointer;border:none;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;}
.btn-primary{background:var(--indigo);color:#fff;box-shadow:var(--shadow);}
.btn-primary:hover{transform:translateY(-2px);background:var(--indigo-deep);}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line);}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--indigo);color:var(--indigo);}

/* ---------- section labels ---------- */
.sec-label{font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--indigo);margin-bottom:10px;}
.sec-head{font-size:clamp(26px,4vw,38px);font-weight:600;letter-spacing:-0.01em;}

/* ---------- featured book (home) ---------- */
.feature{display:grid;grid-template-columns:300px 1fr;margin-top:34px;background:var(--paper-2);
  border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);}
.cover-panel{background:linear-gradient(155deg,#241a55,#140f33);display:flex;align-items:center;justify-content:center;padding:34px;}
.cover-panel img{width:100%;max-width:210px;height:auto;border-radius:6px;box-shadow:0 22px 44px -12px rgba(0,0,0,0.6),0 0 0 1px rgba(255,255,255,0.06);}
.book-body{padding:36px;display:flex;flex-direction:column;justify-content:center;}
.book-body p{margin:0 0 18px;color:var(--ink-soft);}
.book-title{font-size:25px;font-weight:700;line-height:1.1;letter-spacing:-0.01em;margin:0 0 4px;}
.book-sub{font-style:italic;color:var(--ink-soft);font-size:16px;margin:0 0 16px;}

/* ---------- tags & format buttons ---------- */
.tag{align-self:flex-start;font-family:"JetBrains Mono",monospace;font-size:11px;padding:4px 10px;border-radius:30px;margin-bottom:14px;letter-spacing:.02em;}
.tag-live{background:rgba(31,158,148,0.12);color:#147a72;}
.fmt-label{font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--ink-soft);display:block;margin-bottom:11px;letter-spacing:.02em;}
.fmt-row{display:flex;gap:12px;flex-wrap:wrap;}
.fmt{font-family:"JetBrains Mono",monospace;font-size:14px;font-weight:500;text-decoration:none;color:var(--ink);
  background:transparent;border:1.5px solid var(--line);padding:11px 18px;border-radius:11px;display:inline-flex;align-items:center;gap:9px;
  transition:transform .18s ease,border-color .18s ease,color .18s ease,background .18s ease;}
.fmt:hover{transform:translateY(-2px);border-color:var(--indigo);color:var(--indigo);}
.fmt-primary{background:var(--indigo);color:#fff;border-color:var(--indigo);box-shadow:var(--shadow);}
.fmt-primary:hover{background:var(--indigo-deep);color:#fff;border-color:var(--indigo-deep);}
.fmt svg{width:16px;height:16px;}
/* Paperback hidden by default (fail-safe); revealed by script.js for non-India visitors */
.fmt-paperback{display:none;}
.show-paperback .fmt-paperback{display:inline-flex;}

/* ---------- books grid ---------- */
.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:26px;margin-top:38px;}
.card{background:var(--paper-2);border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease;}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);}
.card-cover{background:linear-gradient(155deg,#241a55,#140f33);padding:26px;display:flex;align-items:center;justify-content:center;}
.card-cover img{width:100%;max-width:180px;height:auto;border-radius:5px;box-shadow:0 16px 32px -10px rgba(0,0,0,0.55),0 0 0 1px rgba(255,255,255,0.06);}
.card-body{padding:22px;display:flex;flex-direction:column;flex:1;}
.card-body .book-title{font-size:20px;}
.card-body .book-sub{font-size:14.5px;}
.card-body .fmt-wrap{margin-top:auto;}

/* ---------- about ---------- */
.about-body{max-width:68ch;margin-top:30px;}
.about-body p{margin:0 0 20px;}
.about-body h3{font-size:22px;font-weight:600;margin:34px 0 12px;}
.note-box{background:rgba(242,163,64,0.1);border:1px solid rgba(242,163,64,0.35);border-radius:12px;
  padding:18px 20px;font-size:15.5px;color:var(--amber-deep);font-family:"JetBrains Mono",monospace;margin-top:30px;}

/* ---------- contact form ---------- */
.form-wrap{max-width:560px;margin-top:34px;}
.field{margin-bottom:22px;}
.field label{display:block;font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--ink);margin-bottom:8px;font-weight:500;}
.field input,.field textarea{
  width:100%;font-family:"Newsreader",serif;font-size:17px;color:var(--ink);background:var(--paper-2);
  border:1.5px solid var(--line);border-radius:11px;padding:13px 15px;transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{min-height:150px;resize:vertical;}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--indigo);box-shadow:0 0 0 3px rgba(71,51,176,0.14);}
.field input.invalid,.field textarea.invalid{border-color:#d23f3f;box-shadow:0 0 0 3px rgba(210,63,63,0.12);}
.field .err{display:none;color:#c2362f;font-size:14px;font-family:"JetBrains Mono",monospace;margin-top:7px;}
.field .err.show{display:block;}
.form-status{margin-top:18px;font-family:"JetBrains Mono",monospace;font-size:15px;padding:14px 16px;border-radius:11px;display:none;}
.form-status.show{display:block;}
.form-status.ok{background:rgba(31,158,148,0.12);color:#147a72;}
.form-status.bad{background:rgba(210,63,63,0.1);color:#c2362f;}
.direct-email{margin-top:26px;font-size:16px;color:var(--ink-soft);}
.direct-email a{font-family:"JetBrains Mono",monospace;font-size:14.5px;color:var(--indigo);text-decoration:none;border-bottom:1px solid rgba(71,51,176,0.3);}
.direct-email a:hover{border-bottom-color:var(--indigo);}

/* ---------- footer ---------- */
.site-foot{flex-shrink:0;border-top:1px solid var(--line);padding:34px 0 48px;margin-top:50px;}
.foot-row{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;}
.foot-links{display:flex;gap:20px;font-family:"JetBrains Mono",monospace;font-size:14px;flex-wrap:wrap;}
.foot-links a{color:var(--ink-soft);text-decoration:none;transition:color .2s;}
.foot-links a:hover{color:var(--indigo);}
.foot-sign{font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--ink-soft);}

/* ---------- animations & a11y ---------- */
@keyframes blink{0%,50%{opacity:1;}51%,100%{opacity:0;}}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:4px;}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto;}}

/* ---------- responsive ---------- */
@media (max-width:780px){
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:var(--paper);border-bottom:1px solid var(--line);padding:8px 16px 16px;
    box-shadow:var(--shadow);display:none;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:13px 12px;font-size:15px;border-radius:9px;}
}
@media (max-width:640px){
  .feature{grid-template-columns:1fr;}
  .cover-panel{padding:30px;}
  .cover-panel img{max-width:180px;}
  .book-body{padding:26px;}
}