/* Mobile responsiveness layer. Additive only, keeps the existing desktop UI intact. */
@media (max-width: 680px){
  html,body{width:100%;max-width:100%;overflow-x:hidden}
  section{width:100%;padding-left:5%;padding-right:5%}
  header{padding:8px 0!important}
  nav{width:calc(100% - 16px);height:58px;padding:0 10px;border-radius:16px;gap:7px}
  .logo{font-size:20px}
  .nav-tools{gap:5px;margin-left:auto}
  .tool-btn{height:34px;min-width:34px;padding:0 7px;font-size:9px}
  .mobile-menu-btn{display:inline-flex!important}
  .nav-links.show{display:flex!important;max-height:calc(100vh - 82px);overflow:auto}
  .hero{min-height:auto;padding:115px 5% 70px;gap:30px}
  .hero-text{width:100%}
  .hero h1{font-size:clamp(38px,11vw,52px);line-height:1.05;letter-spacing:-2px;overflow-wrap:anywhere}
  .hero h2{font-size:18px;line-height:1.45}
  .hero-text>p:last-of-type{font-size:15px;line-height:1.7}
  .hero-image{width:min(330px,88vw)!important;max-width:none!important}
  .hero-image img{width:min(260px,78vw)!important;height:auto!important;aspect-ratio:330/420;max-height:none!important}
  .buttons{width:100%;gap:10px}
  .btn{width:100%;min-width:0;padding:13px 16px}
  .section-title{margin-bottom:34px}
  .section-title h2{font-size:clamp(32px,9vw,44px);line-height:1.15;letter-spacing:-1px}
  .section-title p{font-size:11px}
  .about-content,.education-card{width:100%;padding:22px 18px;border-radius:18px}
  .about-content p{font-size:15px;line-height:1.75}
  .education-card h3{font-size:19px;line-height:1.5}
  .skills-container,.projects-container{width:100%;grid-template-columns:1fr!important;gap:14px}
  .skill-card,.project-card{width:100%;min-width:0}
  .skill-card{padding:22px 18px}
  .project-card{border-radius:18px}
  .project-card h3{font-size:18px;padding:16px 16px 7px;line-height:1.4}
  .project-card p{padding:0 16px 18px;font-size:13px;line-height:1.65}
  .project-link{display:inline-block;margin:0 16px 18px}

  /* Critical mobile fix: the Projects section was inheriting the global reveal animation. */
  #projects,#projects.reveal,#projects.reveal-left,#projects.reveal-right{display:block!important;visibility:visible!important;opacity:1!important;transform:none!important}
  #projects .projects-container,#projects .project-card{display:block!important;visibility:visible!important;opacity:1!important;transform:none!important}
  #projects .projects-container{display:grid!important;grid-template-columns:1fr!important}

  .project-card.reveal,.project-card.reveal-left,.project-card.reveal-right,.skill-card.reveal,.skill-card.reveal-left,.skill-card.reveal-right,.about-content.reveal,.about-content.reveal-left,.about-content.reveal-right,.education-card.reveal,.education-card.reveal-left,.education-card.reveal-right{opacity:1!important;transform:none!important}
  .project-image,.project-image.live-preview{height:185px!important;min-height:185px!important;width:100%;border-radius:14px 14px 0 0}

  /* Always show a useful project preview on mobile. */
  .project-image.live-preview img{display:block!important;position:relative;z-index:0}
  .project-image.live-preview .preview-status{display:flex!important;background:radial-gradient(circle at 35% 25%,rgba(105,170,255,.16),transparent 45%),linear-gradient(135deg,#0d1830,#171333);color:#72b7ff;font:800 10px 'Manrope',sans-serif;letter-spacing:1.5px}
  .project-image.live-preview.loaded .preview-status{display:none!important}
  .project-preview-actions{padding:0 14px 14px!important;gap:7px}
  .project-preview-actions a{min-height:40px;font-size:10px}
  .contact-content{width:100%}
  .contact-form-wrap{width:100%;margin-top:22px}
  .contact-form-wrap .contact-form{padding:20px 16px;border-radius:18px}
  .contact-form-grid{grid-template-columns:1fr!important;gap:14px}
  .contact-form-wrap input,.contact-form-wrap textarea{font-size:16px}
  .contact-form-wrap button.btn{width:100%;align-self:stretch}
  .social-links{gap:8px}
  .social-links a{width:100%;text-align:center;padding:11px 14px}
  footer{padding:28px 16px;font-size:12px}
}
@media (min-width:681px) and (max-width:950px){
  .projects-container{grid-template-columns:repeat(2,minmax(0,1fr))!important}
  .skills-container{grid-template-columns:repeat(2,minmax(0,1fr))!important}
}
@media (prefers-reduced-motion: reduce){
  .project-card,.skill-card,.about-content,.education-card,.hero-image,.btn{transition:none!important;animation:none!important}
}

/* Navigation fix: keep mobile links inside a real dropdown, never as a clipped horizontal row. */
@media (max-width: 1050px) {
  header nav { position: relative !important; overflow: visible !important; }
  header nav ul.nav-links { display: none !important; }
  header nav ul.nav-links.show {
    display: flex !important;
    position: absolute !important;
    top: calc(100% + 10px) !important;
    right: 0 !important;
    left: auto !important;
    width: min(280px, calc(100vw - 32px)) !important;
    max-height: calc(100dvh - 110px) !important;
    overflow-y: auto !important;
    flex-direction: column !important;
    align-items: stretch !important;
    justify-content: flex-start !important;
    gap: 4px !important;
    padding: 10px !important;
    margin: 0 !important;
    border: 1px solid rgba(114,183,255,.28) !important;
    border-radius: 16px !important;
    background: rgba(5,10,22,.98) !important;
    box-shadow: 0 18px 48px rgba(0,0,0,.48) !important;
    backdrop-filter: blur(18px) !important;
    -webkit-backdrop-filter: blur(18px) !important;
    z-index: 1100 !important;
  }
  header nav ul.nav-links.show li {
    display: block !important;
    width: 100% !important;
    flex: 0 0 auto !important;
  }
  header nav ul.nav-links.show a {
    display: flex !important;
    align-items: center !important;
    width: 100% !important;
    min-height: 44px !important;
    padding: 10px 12px !important;
    white-space: normal !important;
    border-radius: 10px !important;
    font-size: 14px !important;
    line-height: 1.4 !important;
  }
  header nav ul.nav-links.show a::before { flex: 0 0 auto; }
}
@media (max-width: 380px) {
  header nav { gap: 5px !important; padding-left: 9px !important; padding-right: 8px !important; }
  header nav .logo { font-size: 18px !important; }
  header nav .nav-tools { gap: 4px !important; }
  header nav .tool-btn { min-width: 31px !important; padding-left: 5px !important; padding-right: 5px !important; font-size: 8px !important; }
}


/* Performance tuning: preserve the visual design while reducing expensive paint work on phones. */
@media (max-width: 680px), (pointer: coarse) {
  html { scroll-behavior: auto; }
  body { background-attachment: scroll !important; }
  body:before, body:after { animation: none !important; filter: none !important; }
  header nav, .about-content, .skill-card, .education-card, .project-card,
  .pro-card, .contact-form-wrap .contact-form, .nav-links.show {
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
  }
  .project-card, .skill-card, .education-card, .about-content, .pro-card,
  .hero-image, .hero h1, .hero h2, .section-title h2 {
    animation: none !important;
    transition-duration: .15s !important;
  }
  .project-card:after, .skill-card:after, .about-content:after, .education-card:after {
    display: none !important;
  }
  .project-image.live-preview img, #books .project-image.book-live-preview img {
    transition: none !important;
    transform: none !important;
  }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* Multi-page portfolio home dashboard */
.portal-section{padding-top:40px;padding-bottom:90px}
.portal-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;max-width:1100px;margin:0 auto}
.portal-card{position:relative;display:flex;flex-direction:column;gap:12px;min-height:205px;padding:26px;border:1px solid var(--border);border-radius:22px;background:linear-gradient(145deg,rgba(255,255,255,.055),rgba(255,255,255,.018));color:var(--text);text-decoration:none;transition:transform .22s ease,border-color .22s ease,background .22s ease}
.portal-card:hover{transform:translateY(-4px);border-color:rgba(114,183,255,.5);background:linear-gradient(145deg,rgba(114,183,255,.12),rgba(255,255,255,.025))}
.portal-index{font-family:'Space Grotesk',sans-serif;color:var(--accent);font-size:13px;letter-spacing:2px}
.portal-card h3{font-size:22px;line-height:1.25}
.portal-card p{color:var(--muted);font-size:14px;line-height:1.7}
.portal-cta{margin-top:auto;color:var(--accent);font-weight:700;font-size:13px}
.page-home-link{display:flex;justify-content:center;padding:0 5% 55px}
.page-home-link .btn{width:auto}
@media(max-width:850px){.portal-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:540px){.portal-grid{grid-template-columns:1fr;gap:13px}.portal-card{min-height:160px;padding:22px}.portal-card h3{font-size:20px}.portal-section{padding-top:20px;padding-bottom:55px}}

/* Featured projects on the homepage */
.featured-projects{padding:48px 5% 58px}
.featured-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;max-width:1100px;margin:0 auto}
.featured-card{display:flex;flex-direction:column;align-items:flex-start;gap:13px;min-width:0;padding:25px;border:1px solid var(--border);border-radius:22px;background:linear-gradient(145deg,rgba(255,255,255,.055),rgba(255,255,255,.018));transition:transform .22s ease,border-color .22s ease}
.featured-card:hover{transform:translateY(-3px);border-color:rgba(114,183,255,.48)}
.featured-top{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%}
.featured-number{font-family:'Space Grotesk',sans-serif;font-size:13px;letter-spacing:2px;color:var(--accent)}
.featured-tag{font-size:10px;letter-spacing:1px;font-weight:800;color:var(--muted);border:1px solid var(--border);border-radius:999px;padding:5px 9px}
.featured-card h3{font-size:22px;line-height:1.3}
.featured-card p{font-size:14px;line-height:1.75;color:var(--muted)}
.featured-link{margin-top:auto;color:var(--accent);font-size:13px;font-weight:800;text-decoration:none}
.featured-link:hover{text-decoration:underline}
.featured-footer{display:flex;justify-content:center;margin-top:25px}
@media(max-width:540px){.featured-projects{padding:30px 5% 42px}.featured-grid{grid-template-columns:1fr;gap:13px}.featured-card{padding:21px}.featured-card h3{font-size:20px}}

/* Distinct visual treatments for the homepage destination cards */
.portal-card:nth-child(1){border-radius:28px 12px 28px 12px;background:linear-gradient(135deg,rgba(114,183,255,.14),rgba(255,255,255,.025))}
.portal-card:nth-child(2){border-radius:12px 28px 12px 28px;background:linear-gradient(145deg,rgba(155,124,255,.14),rgba(255,255,255,.025))}
.portal-card:nth-child(3){border-radius:18px;background:linear-gradient(120deg,rgba(87,230,255,.11),rgba(255,255,255,.025));border-style:dashed}
.portal-card:nth-child(4){border-radius:28px;background:linear-gradient(145deg,rgba(255,255,255,.07),rgba(114,183,255,.04));box-shadow:inset 0 0 0 1px rgba(114,183,255,.04)}
.portal-card:nth-child(5){border-radius:12px 12px 28px 28px;background:linear-gradient(145deg,rgba(221,195,130,.11),rgba(255,255,255,.02))}
.portal-card:nth-child(6){border-radius:28px 28px 12px 12px;background:linear-gradient(145deg,rgba(99,220,170,.1),rgba(255,255,255,.025))}
.portal-card:nth-child(odd) .portal-index{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:1px solid currentColor;border-radius:50%}
.portal-card:nth-child(even) .portal-index{display:inline-flex;align-items:center;justify-content:center;min-width:52px;height:30px;padding:0 10px;border-radius:8px;background:rgba(255,255,255,.055)}
.portal-card:nth-child(2){transform:translateY(10px)}
.portal-card:nth-child(2):hover{transform:translateY(4px)}
.portal-card:nth-child(5){transform:translateY(10px)}
.portal-card:nth-child(5):hover{transform:translateY(4px)}
/* Alternating layouts make featured project previews feel less repetitive */
#featured-projects .featured-card:nth-child(2),#featured-projects .featured-card:nth-child(3){display:grid;grid-template-columns:40% minmax(0,1fr);align-items:stretch}
#featured-projects .featured-card:nth-child(2) .featured-preview,#featured-projects .featured-card:nth-child(3) .featured-preview{height:100%;min-height:240px;border-bottom:0;border-right:1px solid rgba(150,190,255,.16)}
#featured-projects .featured-card:nth-child(2) .featured-content,#featured-projects .featured-card:nth-child(3) .featured-content{padding:22px 20px}
#featured-projects .featured-card:nth-child(1){border-radius:24px 12px 24px 12px}
#featured-projects .featured-card:nth-child(2){border-radius:12px 24px 12px 24px}
#featured-projects .featured-card:nth-child(3){border-radius:24px 12px 24px 12px}
#featured-projects .featured-card:nth-child(4){border-radius:12px 24px 12px 24px;background:linear-gradient(145deg,rgba(155,124,255,.09),rgba(255,255,255,.018))}
#featured-projects .featured-card:nth-child(4) .featured-preview{background:linear-gradient(135deg,#211637,#0c2034)}
@media(max-width:680px){
 .portal-card:nth-child(2),.portal-card:nth-child(5){transform:none}
 .portal-card:nth-child(2):hover,.portal-card:nth-child(5):hover{transform:translateY(-3px)}
 #featured-projects .featured-card:nth-child(2),#featured-projects .featured-card:nth-child(3){display:flex}
 #featured-projects .featured-card:nth-child(2) .featured-preview,#featured-projects .featured-card:nth-child(3) .featured-preview{height:180px;min-height:180px;border-right:0;border-bottom:1px solid rgba(150,190,255,.16)}
}

/* Final layout fix: never squeeze featured screenshots into half-width columns. */
#featured-projects .featured-card:nth-child(2),#featured-projects .featured-card:nth-child(3){display:flex!important;grid-template-columns:none!important;align-items:stretch!important}
#featured-projects .featured-card:nth-child(2) .featured-preview,#featured-projects .featured-card:nth-child(3) .featured-preview{width:100%!important;height:auto!important;min-height:0!important;aspect-ratio:16/9!important;border-right:0!important;border-bottom:1px solid rgba(150,190,255,.16)!important}
#featured-projects .featured-card .featured-preview img{width:100%!important;height:100%!important;object-fit:cover!important;object-position:top center!important}
#projects .project-image.live-preview .preview-status,#featured-projects .featured-preview-status{overflow-wrap:anywhere;text-align:center}

/* Graceful branded fallback when external screenshot services block a preview */
.preview-fallback{display:flex!important;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:24px!important;text-align:center!important;overflow:hidden;background:radial-gradient(circle at 50% 0%,rgba(114,183,255,.22),transparent 55%),linear-gradient(145deg,#111e37,#090f1c)!important;color:#d9e9ff!important}
.preview-fallback .fallback-kicker{font-size:10px;letter-spacing:2px;text-transform:uppercase;color:#82caff}
.preview-fallback strong{font:700 clamp(20px,2.3vw,30px)/1.25 'Manrope','Hind Siliguri',sans-serif;color:#f6f8ff;overflow-wrap:anywhere}
.preview-fallback .fallback-caption{font-size:12px;color:#a7b6ce;line-height:1.6}
#featured-projects .featured-preview.preview-fallback{aspect-ratio:16/9}
#projects .project-image.live-preview .preview-fallback{height:100%}
#books .project-image.book-live-preview .preview-fallback{height:100%}

/* Author portfolio: Books & Blog additions */
.author-intro{display:flex;align-items:center;gap:24px;max-width:1040px;margin:28px auto 42px;padding:28px;border:1px solid rgba(221,195,130,.26);border-radius:24px;background:linear-gradient(120deg,rgba(221,195,130,.09),rgba(114,183,255,.055),rgba(255,255,255,.018));box-shadow:0 18px 45px rgba(0,0,0,.12)}
.author-intro-mark{flex:0 0 86px;width:86px;height:86px;display:grid;place-items:center;border:1px solid rgba(221,195,130,.6);border-radius:24px;color:#ddc382;font:700 38px 'Space Grotesk',sans-serif;background:rgba(221,195,130,.07)}
.author-intro-copy{min-width:0}.author-eyebrow{display:block;margin-bottom:7px;color:#ddc382;font-size:10px;letter-spacing:1.8px;font-weight:800}.author-intro-copy h3{font-size:clamp(22px,3vw,30px);line-height:1.35;margin-bottom:9px}.author-intro-copy p{max-width:680px;color:var(--muted);font-size:14px;line-height:1.85}.author-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.author-tags span{padding:6px 10px;border:1px solid var(--border);border-radius:999px;color:var(--muted);font-size:11px}
.books-heading{display:flex;align-items:end;justify-content:space-between;gap:12px;max-width:1040px;margin:0 auto 18px}.books-heading h3{font-size:21px}.books-heading p{font-size:12px;color:var(--muted)}
.blog-hero{max-width:1040px;margin:30px auto 34px;padding:32px;border:1px solid var(--border);border-radius:24px;background:radial-gradient(circle at 100% 0%,rgba(114,183,255,.15),transparent 48%),linear-gradient(140deg,rgba(255,255,255,.04),rgba(255,255,255,.015))}
.blog-hero .blog-eyebrow{font-size:11px;font-weight:800;letter-spacing:2px;color:var(--accent)}.blog-hero h3{font-size:clamp(25px,4vw,38px);line-height:1.25;margin:10px 0}.blog-hero p{max-width:720px;color:var(--muted);line-height:1.85}.blog-filters{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.blog-filters span{border:1px solid var(--border);border-radius:999px;padding:6px 10px;color:var(--muted);font-size:11px}
.blog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;max-width:1040px;margin:0 auto 55px}.blog-card{display:flex;flex-direction:column;min-width:0;padding:23px;border:1px solid var(--border);border-radius:20px;background:linear-gradient(145deg,rgba(255,255,255,.045),rgba(255,255,255,.012));transition:transform .22s,border-color .22s}.blog-card:hover{transform:translateY(-4px);border-color:rgba(114,183,255,.48)}.blog-card .blog-category{font-size:10px;font-weight:800;letter-spacing:1.4px;color:var(--accent)}.blog-card h3{font-size:20px;line-height:1.45;margin:13px 0 9px}.blog-card p{color:var(--muted);font-size:13px;line-height:1.8}.blog-card .blog-meta{margin-top:12px;color:var(--muted);font-size:11px}.blog-card a{margin-top:auto;padding-top:18px;color:var(--accent);font-weight:800;font-size:13px;text-decoration:none}.blog-card a:hover{text-decoration:underline}
.blog-article{max-width:820px;margin:28px auto 60px;padding:clamp(22px,5vw,48px);border:1px solid var(--border);border-radius:24px;background:rgba(255,255,255,.018)}.blog-article .article-category{color:var(--accent);font-size:11px;font-weight:800;letter-spacing:1.5px}.blog-article h2{font-size:clamp(28px,5vw,42px);line-height:1.3;margin:12px 0}.blog-article .article-lead{font-size:17px;line-height:1.9;color:var(--muted);margin-bottom:25px}.blog-article h3{font-size:22px;margin:28px 0 10px}.blog-article p,.blog-article li{font-size:15px;line-height:1.95;color:var(--muted);margin-bottom:12px}.blog-article ul{padding-left:22px}.blog-article .article-note{padding:16px;border-left:3px solid var(--accent);background:rgba(114,183,255,.06);border-radius:0 12px 12px 0}.blog-back{display:inline-flex;margin-top:22px;color:var(--accent);font-weight:800;text-decoration:none}
@media(max-width:850px){.blog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.author-intro{align-items:flex-start;gap:16px;padding:20px;margin:20px auto 30px}.author-intro-mark{flex-basis:56px;width:56px;height:56px;border-radius:16px;font-size:28px}.author-intro-copy h3{font-size:22px}.books-heading{align-items:flex-start;flex-direction:column}.blog-hero{padding:23px;margin:20px auto 26px}.blog-grid{grid-template-columns:1fr;gap:13px}.blog-card{padding:21px}.blog-article{padding:22px;margin-top:20px}}