/* ===========================================
   AMAN DUBEY -- PORTFOLIO  |  TECHY DARK THEME
   Enhanced Visual Edition
   =========================================== */

/* ===== RESET ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --bg:#050508;
  --surface:#0c0c10;
  --surface2:#111116;
  --surface3:#18181d;
  --border:#1e1e24;
  --border-hover:rgba(0,255,136,.3);
  --text:#e4e4e7;
  --muted:#71717a;
  --dim:#3f3f46;
  --green:#00ff88;
  --green-dim:rgba(0,255,136,.12);
  --cyan:#22d3ee;
  --cyan-dim:rgba(34,211,238,.1);
  --purple:#a78bfa;
  --purple-dim:rgba(167,139,250,.1);
  --amber:#fbbf24;
  --red:#f87171;
  --glow:rgba(0,255,136,.06);
  --glow-strong:rgba(0,255,136,.15);
  --glow-cyan:rgba(34,211,238,.12);
  --glow-purple:rgba(167,139,250,.12);
  --gradient-main:linear-gradient(135deg,var(--green),var(--cyan));
  --gradient-warm:linear-gradient(135deg,var(--amber),var(--green));
  --gradient-cool:linear-gradient(135deg,var(--cyan),var(--purple));
  --radius:12px;
  --radius-sm:8px;
  --radius-lg:16px;
  --max-w:1120px;
  --ease:cubic-bezier(.16,1,.3,1);
  --font:'Space Grotesk',system-ui,sans-serif;
  --mono:'JetBrains Mono','DM Mono','Fira Code',monospace;
}

html{scroll-behavior:smooth;scrollbar-width:thin;scrollbar-color:var(--border) var(--bg)}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;overflow-x:hidden;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.mono{font-family:var(--mono)}
::selection{background:var(--green);color:#000}

/* Custom Scrollbar */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--green)}

/* ===== AMBIENT BACKGROUND ===== */
body::before{
  content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(0,255,136,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,255,136,.03) 1px,transparent 1px);
  background-size:60px 60px;
}

/* Scanline overlay */
body::after{
  content:'';position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:.015;
  background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,255,136,.08) 2px,rgba(0,255,136,.08) 4px);
}

/* Ambient glow orbs */
.ambient-glow{position:fixed;border-radius:50%;filter:blur(120px);pointer-events:none;z-index:0;opacity:.4;animation:floatOrb 20s ease-in-out infinite}
.ambient-glow.g1{width:400px;height:400px;background:rgba(0,255,136,.04);top:10%;left:-5%;animation-delay:0s}
.ambient-glow.g2{width:350px;height:350px;background:rgba(34,211,238,.04);top:50%;right:-8%;animation-delay:-7s}
.ambient-glow.g3{width:300px;height:300px;background:rgba(167,139,250,.04);bottom:5%;left:30%;animation-delay:-14s}
@keyframes floatOrb{0%,100%{transform:translate(0,0)}25%{transform:translate(30px,-20px)}50%{transform:translate(-15px,30px)}75%{transform:translate(20px,15px)}}

/* ===== PAGE TRANSITION ===== */
.page-wrap{position:relative;z-index:1;opacity:0;transform:translateY(14px);animation:pageIn .5s var(--ease) forwards}
@keyframes pageIn{to{opacity:1;transform:translateY(0)}}
@keyframes pageOut{to{opacity:0;transform:translateY(-10px)}}

/* ===== SCROLL REVEAL ===== */
.sr{opacity:0;transform:translateY(24px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.sr.visible{opacity:1;transform:translateY(0)}
.sr-d1{transition-delay:.08s}.sr-d2{transition-delay:.16s}.sr-d3{transition-delay:.24s}.sr-d4{transition-delay:.32s}.sr-d5{transition-delay:.4s}.sr-d6{transition-delay:.48s}

/* ===== UTILITY ===== */
.container{max-width:var(--max-w);margin:0 auto;padding:0 2rem}
.gradient-text{background:linear-gradient(135deg,var(--green),var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.section{padding:80px 0}

/* Terminal prefix */
.terminal-label{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;color:var(--green);display:flex;align-items:center;gap:8px;margin-bottom:12px}
.terminal-label::before{content:'>';color:var(--green);font-weight:700;text-shadow:0 0 8px var(--glow-strong)}
.section-title{font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:700;letter-spacing:-.035em;margin-bottom:.4rem}
.section-desc{color:var(--muted);max-width:520px;margin-bottom:2.5rem;line-height:1.7;font-size:.92rem}

/* ===== NAV ===== */
.navbar{position:fixed;top:0;left:0;width:100%;z-index:1000;padding:.8rem 0;transition:all .35s}
.navbar.scrolled{background:rgba(5,5,8,.88);backdrop-filter:blur(24px) saturate(1.8);border-bottom:1px solid var(--border);box-shadow:0 4px 30px rgba(0,0,0,.3)}
.navbar .container{display:flex;align-items:center;justify-content:space-between}

.nav-logo{font-family:var(--mono);font-weight:700;font-size:1rem;color:var(--green);display:flex;align-items:center;gap:4px;text-shadow:0 0 20px var(--glow)}
.nav-logo .slash{color:var(--dim)}
.nav-logo .name{color:var(--text)}

.nav-links{display:flex;gap:2px;list-style:none;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:3px}
.nav-links a{font-family:var(--mono);font-size:.75rem;color:var(--muted);font-weight:500;padding:7px 14px;border-radius:6px;transition:all .25s;display:flex;align-items:center;gap:6px}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.03)}
.nav-links a.active{background:var(--green-dim);color:var(--green);box-shadow:0 0 12px var(--glow)}
.nav-links .nav-key{font-size:.58rem;padding:1px 5px;background:var(--surface2);border:1px solid var(--border);border-radius:3px;color:var(--dim);line-height:1.4}

.nav-cta{font-family:var(--mono);padding:8px 18px;background:transparent;color:var(--green);border-radius:6px;font-size:.78rem;font-weight:600;transition:all .3s;border:1px solid rgba(0,255,136,.25);cursor:pointer;display:inline-flex;align-items:center;gap:6px;position:relative;overflow:hidden}
.nav-cta::before{content:'';position:absolute;inset:0;background:var(--gradient-main);opacity:0;transition:opacity .3s}
.nav-cta:hover{border-color:var(--green);box-shadow:0 0 25px var(--glow),0 0 50px rgba(0,255,136,.08);color:#050508}
.nav-cta:hover::before{opacity:.15}

.mobile-toggle{display:none;background:none;border:1px solid var(--border);color:var(--green);font-size:1rem;cursor:pointer;width:44px;height:44px;border-radius:8px;align-items:center;justify-content:center;transition:all .3s;font-family:var(--mono)}
.mobile-toggle:hover{background:var(--green-dim);border-color:var(--green)}

/* Mobile nav drawer */
.mobile-nav{position:fixed;top:0;right:-100%;width:min(300px,85vw);height:100vh;height:100dvh;background:rgba(12,12,16,.97);backdrop-filter:blur(20px);border-left:1px solid var(--border);z-index:1001;padding:70px 1.5rem 2rem;transition:right .4s var(--ease);display:flex;flex-direction:column;gap:4px;overscroll-behavior:contain}
.mobile-nav.open{right:0}
.mobile-nav a{font-family:var(--mono);font-size:.92rem;color:var(--muted);font-weight:500;padding:14px 16px;border-radius:var(--radius-sm);transition:all .25s;display:block;border-left:2px solid transparent;min-height:48px;display:flex;align-items:center}
.mobile-nav a:hover,.mobile-nav a.active{color:var(--green);background:var(--green-dim);border-left-color:var(--green);text-shadow:0 0 10px var(--glow)}
.mobile-overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(8px);z-index:1000;opacity:0;pointer-events:none;transition:opacity .3s}
.mobile-overlay.open{opacity:1;pointer-events:auto}
.mobile-close{position:absolute;top:1rem;right:1rem;background:none;border:1px solid var(--border);color:var(--muted);font-size:.9rem;cursor:pointer;width:44px;height:44px;border-radius:8px;display:flex;align-items:center;justify-content:center;transition:all .3s;font-family:var(--mono)}
.mobile-close:hover{background:rgba(248,113,113,.08);border-color:var(--red);color:var(--red)}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;gap:7px;padding:10px 20px;border-radius:var(--radius-sm);font-size:.84rem;font-weight:600;font-family:var(--mono);transition:all .3s;cursor:pointer;border:none;position:relative;overflow:hidden}
.btn-primary{background:var(--green);color:#050508;box-shadow:0 0 20px var(--glow)}
.btn-primary:hover{box-shadow:0 0 40px var(--glow-strong),0 4px 24px var(--glow),inset 0 0 20px rgba(255,255,255,.1);transform:translateY(-2px);letter-spacing:.02em}
.btn-primary::after{content:'';position:absolute;top:50%;left:50%;width:0;height:0;background:rgba(255,255,255,.2);border-radius:50%;transform:translate(-50%,-50%);transition:width .6s,height .6s}
.btn-primary:hover::after{width:300px;height:300px}
.btn-outline{background:transparent;color:var(--text);border:1px solid var(--border);position:relative}
.btn-outline::before{content:'';position:absolute;inset:0;background:var(--gradient-main);opacity:0;transition:opacity .3s;border-radius:inherit}
.btn-outline:hover{border-color:var(--green);color:var(--green);box-shadow:0 0 20px var(--glow)}
.btn-outline:hover::before{opacity:.06}
.btn-ghost{background:transparent;color:var(--muted);padding:10px 14px}
.btn-ghost:hover{color:var(--green);text-shadow:0 0 10px var(--glow)}

/* ===== CARDS ===== */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);transition:all .4s var(--ease);position:relative;overflow:hidden}
.card:hover{border-color:var(--border-hover);transform:translateY(-3px);box-shadow:0 12px 40px rgba(0,0,0,.3),0 0 30px var(--glow)}
.card::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--green),transparent);opacity:0;transition:opacity .4s}
.card:hover::before{opacity:.7}

/* ===== CHIP / TAG ===== */
.chip{display:inline-flex;align-items:center;gap:5px;padding:4px 11px;background:var(--surface2);border:1px solid var(--border);border-radius:6px;font-family:var(--mono);font-size:.7rem;color:var(--muted);font-weight:500;transition:all .3s}
.chip:hover{border-color:var(--green);color:var(--green);box-shadow:0 0 10px var(--glow)}
.chip i{color:var(--green);font-size:.65rem}
.tag{font-family:var(--mono);font-size:.65rem;padding:3px 9px;background:var(--green-dim);border:1px solid rgba(0,255,136,.12);border-radius:4px;color:var(--green);display:inline-block;transition:all .3s}
.tag:hover{background:rgba(0,255,136,.2);box-shadow:0 0 8px var(--glow)}

/* ===== CODE BLOCK STYLE ===== */
.code-block{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:0 8px 32px rgba(0,0,0,.3)}
.code-header{display:flex;align-items:center;gap:8px;padding:10px 16px;background:var(--surface2);border-bottom:1px solid var(--border)}
.code-dot{width:8px;height:8px;border-radius:50%;transition:box-shadow .3s}
.code-dot.red{background:#f87171}.code-dot.yellow{background:#fbbf24}.code-dot.green{background:#34d399}
.code-block:hover .code-dot.red{box-shadow:0 0 6px rgba(248,113,113,.5)}
.code-block:hover .code-dot.yellow{box-shadow:0 0 6px rgba(251,191,36,.5)}
.code-block:hover .code-dot.green{box-shadow:0 0 6px rgba(52,211,153,.5)}
.code-filename{font-family:var(--mono);font-size:.7rem;color:var(--dim);margin-left:8px}
.code-body{padding:20px;font-family:var(--mono);font-size:.82rem;line-height:1.8}
.code-line{display:flex;gap:16px;transition:background .2s;padding:0 4px}
.code-line:hover{background:rgba(0,255,136,.03)}
.code-num{color:var(--dim);min-width:24px;text-align:right;user-select:none}
.code-key{color:var(--purple)}
.code-str{color:var(--green)}
.code-val{color:var(--cyan)}
.code-comment{color:var(--dim);font-style:italic}

/* ===== STATUS INDICATOR ===== */
.status{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:.72rem;font-weight:600}
.status-dot{width:6px;height:6px;border-radius:50%;animation:blink 2s ease-in-out infinite;box-shadow:0 0 6px var(--green)}
.status-dot.online{background:var(--green)}
.status-dot.busy{background:var(--amber)}
@keyframes blink{0%,100%{opacity:1;box-shadow:0 0 8px currentColor}50%{opacity:.3;box-shadow:0 0 2px currentColor}}

/* ===== CERTIFICATION BADGE ===== */
.cert-badge{font-family:var(--mono);font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:#050508;background:var(--amber);padding:2px 8px;border-radius:3px;display:inline-block;margin-bottom:4px;box-shadow:0 0 12px rgba(251,191,36,.3)}

/* ===== FOOTER ===== */
.site-footer{padding:50px 0 24px;border-top:1px solid var(--border);position:relative;z-index:1}
.site-footer::before{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);width:200px;height:1px;background:linear-gradient(90deg,transparent,var(--green),var(--cyan),transparent)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px}
.footer-left{font-family:var(--mono);font-size:.75rem;color:var(--dim)}
.footer-left span{color:var(--green)}
.footer-links{display:flex;gap:12px}
.footer-links a{width:34px;height:34px;border-radius:8px;background:var(--surface);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:.85rem;color:var(--muted);transition:all .35s}
.footer-links a:hover{color:var(--green);border-color:var(--green);box-shadow:0 0 15px var(--glow);transform:translateY(-3px)}

/* ===== REDUCED MOTION ===== */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  .sr{opacity:1;transform:none}
  .page-wrap{animation:none;opacity:1;transform:none}
  .ambient-glow{animation:none}
  .marquee-track{animation:none}
}

/* ===== FOCUS VISIBLE ===== */
:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:4px}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--green);outline-offset:2px}

/* ===== ACTIVE STATES (mobile touch feedback) ===== */
@media(hover:none){
  .btn:active{transform:scale(.96) !important;opacity:.85;transition:transform .08s,opacity .08s}
  .btn-primary:active{box-shadow:0 0 8px var(--glow)}
  .p-card:active,.exp-card:active,.edu-card:active,.cert-card:active,.sk-item:active,.t-card:active,.ct-link:active{transform:scale(.98) !important;transition:transform .1s}
  .tag:active,.chip:active,.f-tab:active,.tf-btn:active{transform:scale(.93);transition:transform .08s}
  .footer-links a:active,.ct-socials a:active{transform:scale(.9);transition:transform .08s}
  .nav-links a:active,.mobile-nav a:active{background:var(--green-dim)}
}

/* ===== SCROLL-TO-TOP BUTTON ===== */
.scroll-top{position:fixed;bottom:28px;right:28px;width:44px;height:44px;border-radius:12px;background:var(--surface);border:1px solid var(--border);color:var(--green);display:flex;align-items:center;justify-content:center;font-size:1rem;cursor:pointer;z-index:999;opacity:0;visibility:hidden;transform:translateY(16px);transition:all .35s var(--ease);box-shadow:0 4px 20px rgba(0,0,0,.3);-webkit-tap-highlight-color:transparent}
.scroll-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.scroll-top:hover{border-color:var(--green);box-shadow:0 0 24px var(--glow);transform:translateY(-3px)}
.scroll-top:active{transform:scale(.9)}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .nav-links{display:none}
  .mobile-toggle{display:flex}
  .nav-cta{display:none}
}
@media(max-width:600px){
  .container{padding:0 1.2rem}
  .section{padding:60px 0}
  .section-title{font-size:clamp(1.4rem,6vw,2rem)}
  .section-desc{font-size:.86rem}
  /* Better mobile touch targets */
  .footer-links{gap:8px}
  .footer-links a{width:42px;height:42px;font-size:.92rem}
  .footer-inner{justify-content:center;text-align:center}
  .footer-left{width:100%;text-align:center}
  .scroll-top{bottom:20px;right:16px;width:40px;height:40px;border-radius:10px}
}
@media(max-width:400px){
  .container{padding:0 1rem}
  .section{padding:48px 0}
  .btn{padding:10px 16px;font-size:.8rem;min-height:44px}
}

/* ===== SAFE AREA (notch / dynamic island) ===== */
@supports(padding-bottom:env(safe-area-inset-bottom)){
  .site-footer{padding-bottom:calc(24px + env(safe-area-inset-bottom))}
  .scroll-top{bottom:calc(28px + env(safe-area-inset-bottom))}
  .mobile-nav{padding-bottom:calc(2rem + env(safe-area-inset-bottom))}
  @media(max-width:600px){
    .scroll-top{bottom:calc(20px + env(safe-area-inset-bottom))}
  }
}