/* Pramansu Biswas Portfolio — visual system */
:root {
  --bg: #050a13;
  --bg-soft: #08111f;
  --surface: rgba(13, 24, 41, .72);
  --surface-solid: #0d1829;
  --border: rgba(148, 163, 184, .14);
  --text: #f7faff;
  --muted: #98a6bb;
  --blue: #35a7ff;
  --cyan: #4de4ff;
  --purple: #9b6cff;
  --shadow: 0 24px 70px rgba(0,0,0,.3);
}
:root.light {
  --bg: #f5f8fc; --bg-soft: #eef4fb; --surface: rgba(255,255,255,.8);
  --surface-solid: #fff; --border: rgba(15,23,42,.1); --text: #0b1220; --muted: #536174;
  --shadow: 0 24px 70px rgba(15,23,42,.1);
}
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin:0; background:var(--bg); color:var(--text); font-family:Inter, sans-serif; overflow-x:hidden; }
h1,h2,h3,.navbar-brand { font-family:"Space Grotesk", sans-serif; }
a { color:inherit; text-decoration:none; }
.muted { color:var(--muted); line-height:1.8; }
.section-pad { padding:110px 0; position:relative; }
.section-alt { background:linear-gradient(180deg, transparent, var(--bg-soft), transparent); }
.navbar { padding:18px 0; background:rgba(5,10,19,.5); backdrop-filter:blur(18px); transition:.3s; border-bottom:1px solid transparent; }
.navbar.scrolled { background:rgba(5,10,19,.86); border-color:var(--border); }
.light .navbar.scrolled { background:rgba(245,248,252,.88); }
.navbar-brand { letter-spacing:-.5px; }
.brand-dot { width:9px;height:9px;border-radius:50%;display:inline-block;background:linear-gradient(135deg,var(--cyan),var(--purple));margin-right:9px;box-shadow:0 0 18px var(--cyan); }
.nav-link { color:var(--muted); font-size:.9rem; padding:9px 12px!important; transition:.25s; }
.nav-link:hover,.nav-link.active { color:var(--text); }
.navbar-toggler { color:var(--text); }
.btn-primary-gradient { border:0; color:#fff; background:linear-gradient(135deg,#168dff,#805cff); box-shadow:0 10px 30px rgba(62,120,255,.22); transition:.25s; }
.btn-primary-gradient:hover { color:#fff; transform:translateY(-2px); box-shadow:0 15px 36px rgba(62,120,255,.3); }
.theme-toggle { width:40px;height:40px;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:50%; }
.hero { min-height:100vh; display:flex; align-items:center; padding-top:130px; overflow:hidden; }
.hero-grid { position:absolute; inset:0; background-image:linear-gradient(rgba(100,150,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(100,150,255,.05) 1px,transparent 1px); background-size:56px 56px; mask-image:linear-gradient(to bottom,black,transparent 80%); }
.hero:after { content:""; position:absolute; width:500px;height:500px;right:-180px;top:5%;background:rgba(77,228,255,.12);filter:blur(100px);border-radius:50%; }
.eyebrow { display:inline-flex; align-items:center; gap:9px; color:#8dcfff; text-transform:uppercase; letter-spacing:.14em; font-size:.73rem; font-weight:700; margin-bottom:18px; }
.pulse-dot { width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 6px rgba(77,228,255,.1); }
.hero h1 { font-size:clamp(3rem,7vw,6.7rem); line-height:.98; letter-spacing:-.065em; max-width:900px; margin-bottom:26px; }
.gradient-text { background:linear-gradient(90deg,var(--cyan),#62a9ff 45%,var(--purple)); -webkit-background-clip:text;background-clip:text;color:transparent; }
.hero-lead { max-width:680px; color:var(--muted); font-size:1.1rem; line-height:1.85; }
.hero-lead strong { color:var(--text); }
.hero-meta { display:flex;flex-wrap:wrap;gap:18px;color:var(--muted);font-size:.82rem; }
.hero-meta i { color:var(--cyan); margin-right:5px; }
.code-card { position:relative; min-height:420px; padding:58px 28px 30px; border:1px solid var(--border); border-radius:24px; background:linear-gradient(145deg,rgba(18,35,59,.9),rgba(7,13,23,.82)); box-shadow:var(--shadow); transform:perspective(900px) rotateY(-4deg); }
.code-top { position:absolute;top:0;left:0;right:0;height:48px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:7px;padding:0 18px;color:var(--muted); }
.code-top span { width:8px;height:8px;border-radius:50%;background:#506078; }.code-top small { margin-left:auto;font-size:.7rem; }
pre { white-space:pre-wrap; color:#dbe9ff; font-size:.85rem; line-height:1.9; }
.c-purple{color:#c29cff}.c-blue{color:#62b9ff}.c-green{color:#6ff0b0}
.floating-badge { position:absolute;padding:9px 13px;border:1px solid var(--border);border-radius:12px;background:rgba(9,17,29,.82);backdrop-filter:blur(12px);font-size:.75rem;box-shadow:0 12px 30px rgba(0,0,0,.2);animation:float 4s ease-in-out infinite; }
.floating-badge i { margin-right:5px;color:var(--cyan); }.badge-html{top:15%;right:-25px}.badge-js{bottom:17%;left:-25px;animation-delay:1s}.badge-bootstrap{bottom:5%;right:12%;animation-delay:2s}
@keyframes float{50%{transform:translateY(-10px)}}
.scroll-indicator { position:absolute;bottom:25px;left:50%;transform:translateX(-50%);color:var(--muted);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;display:flex;flex-direction:column;align-items:center;gap:9px; }
.scroll-indicator span{width:1px;height:35px;background:linear-gradient(var(--cyan),transparent);}
.section-heading { margin-bottom:55px; }.section-heading h2 { font-size:clamp(2.4rem,5vw,4.5rem);letter-spacing:-.05em;margin:0; }.section-heading p{max-width:600px;margin-top:15px}
.large-copy{font-size:1.25rem;line-height:1.8}.profile-frame{min-height:430px;border:1px solid var(--border);border-radius:28px;background:radial-gradient(circle at 50% 30%,rgba(77,228,255,.14),transparent 40%),var(--surface);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.profile-placeholder{width:70%;aspect-ratio:1;border-radius:50%;border:1px dashed rgba(77,228,255,.45);display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);gap:8px;background:rgba(77,228,255,.03)}.profile-placeholder i{font-size:4rem;color:var(--cyan)}
.profile-orbit{position:absolute;border:1px solid rgba(155,108,255,.25);border-radius:50%;inset:10%;transform:rotate(-20deg)}.orbit-two{inset:18%;transform:rotate(45deg)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.stat-card{padding:20px;border:1px solid var(--border);border-radius:16px;background:var(--surface)}.stat-card strong{font:700 1.5rem "Space Grotesk";display:block}.stat-card span{font-size:.72rem;color:var(--muted);display:block;margin-top:5px}
.skill-card,.service-card,.why-card,.testimonial-card,.project-card{height:100%;border:1px solid var(--border);background:var(--surface);border-radius:20px;transition:.3s;box-shadow:0 10px 35px rgba(0,0,0,.05)}.skill-card{padding:24px}.skill-card:hover,.service-card:hover,.why-card:hover,.testimonial-card:hover,.project-card:hover{transform:translateY(-6px);border-color:rgba(77,228,255,.3);box-shadow:var(--shadow)}
.skill-icon,.service-icon,.why-icon{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(53,167,255,.15),rgba(155,108,255,.15));color:var(--cyan);font-size:1.35rem}.skill-card h3{font-size:1rem;margin:17px 0 5px}.skill-card small{color:var(--muted)}
.skill-bar{height:4px;background:rgba(148,163,184,.12);border-radius:10px;margin-top:16px;overflow:hidden}.skill-bar span{height:100%;display:block;width:var(--level);background:linear-gradient(90deg,var(--cyan),var(--purple));border-radius:inherit}
.service-card{padding:28px}.service-card h3{font-size:1.15rem;margin:20px 0 10px}.service-card p{color:var(--muted);font-size:.9rem;line-height:1.7}
.filter-wrap{display:flex;gap:6px;flex-wrap:wrap}.filter-btn{border:1px solid var(--border);background:var(--surface);color:var(--muted);padding:9px 14px;border-radius:999px;font-size:.78rem}.filter-btn.active,.filter-btn:hover{background:rgba(53,167,255,.12);color:var(--text);border-color:rgba(53,167,255,.35)}
.project-card{overflow:hidden}.project-thumb{height:210px;background:linear-gradient(135deg,#101d32,#0b1020);display:grid;place-items:center;position:relative;overflow:hidden}.project-thumb:before{content:"";position:absolute;width:150px;height:150px;border-radius:50%;background:rgba(77,228,255,.15);filter:blur(25px)}.project-thumb i{font-size:4rem;color:#86dfff;z-index:1}.project-body{padding:24px}.project-body h3{font-size:1.2rem}.project-body p{font-size:.85rem;color:var(--muted);line-height:1.7}.tags{display:flex;gap:6px;flex-wrap:wrap}.tag{font-size:.65rem;padding:5px 8px;border-radius:6px;background:rgba(148,163,184,.08);color:var(--muted)}
.project-actions{display:flex;gap:8px;margin-top:20px}.project-actions a{font-size:.76rem;padding:8px 12px;border:1px solid var(--border);border-radius:8px}.project-actions a:first-child{background:rgba(53,167,255,.1);border-color:rgba(53,167,255,.25)}
.timeline{max-width:850px;margin:auto;position:relative}.timeline:before{content:"";position:absolute;left:18px;top:0;bottom:0;width:1px;background:linear-gradient(var(--cyan),rgba(155,108,255,.15))}.timeline-item{position:relative;padding:0 0 50px 65px}.timeline-dot{position:absolute;left:11px;top:3px;width:15px;height:15px;border-radius:50%;background:var(--bg);border:3px solid var(--cyan);box-shadow:0 0 20px rgba(77,228,255,.35)}.timeline-item .date{font-size:.7rem;color:var(--cyan);text-transform:uppercase;letter-spacing:.1em}.timeline-item h3{font-size:1.25rem;margin:7px 0}.timeline-item p{color:var(--muted);line-height:1.7;margin:0}
.stack-strip{padding:50px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);overflow:hidden}.stack-title{text-align:center;text-transform:uppercase;letter-spacing:.16em;font-size:.7rem;color:var(--muted);margin-bottom:24px}.marquee{overflow:hidden}.marquee-track{display:flex;width:max-content;gap:50px;animation:marquee 22s linear infinite}.marquee-item{font:600 1.2rem "Space Grotesk";color:var(--muted);white-space:nowrap}.marquee-item i{color:var(--cyan);margin-right:8px}@keyframes marquee{to{transform:translateX(-50%)}}
.why-card{padding:28px}.why-card h3{font-size:1.05rem;margin:18px 0 8px}.why-card p{color:var(--muted);font-size:.85rem;line-height:1.7;margin:0}
.testimonial-card{padding:28px}.quote{font-size:1.05rem;line-height:1.8;color:#dce6f5}.placeholder-label{font-size:.65rem;color:var(--purple);text-transform:uppercase;letter-spacing:.1em}.person{display:flex;gap:12px;align-items:center;margin-top:22px}.avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--purple));display:grid;place-items:center;color:#fff}
.contact-box{padding:60px;border:1px solid var(--border);border-radius:28px;background:radial-gradient(circle at 80% 20%,rgba(53,167,255,.1),transparent 35%),var(--surface);box-shadow:var(--shadow)}.contact-box h2{font-size:clamp(2.5rem,5vw,4.5rem);letter-spacing:-.05em}.contact-list{display:grid;gap:16px}.contact-list>div{display:flex;gap:13px;align-items:center}.contact-list i{width:38px;height:38px;border-radius:10px;background:rgba(77,228,255,.08);color:var(--cyan);display:grid;place-items:center}.contact-list small,.contact-list strong{display:block}.contact-list small{color:var(--muted);font-size:.65rem;text-transform:uppercase;letter-spacing:.1em}.contact-list strong{font-size:.88rem;margin-top:3px}
.socials{display:flex;gap:9px}.socials a{width:40px;height:40px;border:1px solid var(--border);border-radius:10px;display:grid;place-items:center;color:var(--muted);transition:.2s}.socials a:hover{color:var(--cyan);border-color:rgba(77,228,255,.4);transform:translateY(-2px)}
.form-control{background:rgba(3,9,18,.35);border:1px solid var(--border);color:var(--text);padding:13px 15px;border-radius:11px}.form-control:focus{background:rgba(3,9,18,.5);color:var(--text);border-color:rgba(77,228,255,.5);box-shadow:0 0 0 4px rgba(77,228,255,.07)}label{font-size:.72rem;color:var(--muted);margin:0 0 7px 2px}.form-status{min-height:22px;margin-top:12px;font-size:.8rem;color:#70e6ad}
.to-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;border:1px solid var(--border);background:var(--surface-solid);color:var(--text);opacity:0;pointer-events:none;transition:.25s;z-index:1000}.to-top.show{opacity:1;pointer-events:auto}
.footer{padding:30px 0;border-top:1px solid var(--border);color:var(--muted);font-size:.72rem}.footer strong{color:var(--text)}.footer-links{display:flex;gap:15px}.footer-links a:hover{color:var(--text)}
#page-loader{position:fixed;inset:0;background:var(--bg);display:grid;place-items:center;z-index:9999;transition:.4s}.loader-ring{width:38px;height:38px;border:2px solid rgba(77,228,255,.2);border-top-color:var(--cyan);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.reveal{opacity:0;transform:translateY(25px);transition:.7s ease}.reveal.visible{opacity:1;transform:none}
@media(max-width:991px){.navbar{background:rgba(5,10,19,.9)}.navbar-collapse{padding:15px 0}.hero{padding-top:120px}.hero h1{font-size:clamp(3rem,12vw,5rem)}.code-card{transform:none;margin-top:20px}.stats-grid{grid-template-columns:repeat(2,1fr)}.contact-box{padding:35px}}
@media(max-width:575px){.section-pad{padding:80px 0}.hero{min-height:auto;padding-bottom:130px}.hero h1{font-size:3.1rem}.hero-meta{gap:10px;display:grid}.code-card{min-height:380px;padding-left:18px;padding-right:18px}.code-card pre{font-size:.68rem}.floating-badge{display:none}.section-heading{margin-bottom:38px}.stats-grid{grid-template-columns:repeat(2,1fr)}.stat-card{padding:15px}.contact-box{padding:24px}.footer{text-align:center}.footer>div{margin-bottom:8px;justify-content:center}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}