@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------------------------------------------
   Design tokens — AmanK. / AI Engineer portfolio
--------------------------------------------- */
:root{
    --bg:            #070b14;
    --bg-soft:       #0b1120;
    --panel:         #0f1830;
    --panel-2:       #121d38;
    --border:        rgba(148,163,196,0.14);
    --border-strong: rgba(148,163,196,0.28);

    --text:          #e9edf6;
    --text-dim:      #97a2ba;
    --text-faint:    #5c6884;

    --cyan:          #29e0ff;
    --violet:        #8b7dff;
    --grad:          linear-gradient(120deg, var(--cyan), var(--violet));
    --grad-soft:     linear-gradient(120deg, rgba(41,224,255,0.14), rgba(139,125,255,0.14));

    --font-display: 'Space Grotesk', sans-serif;
    --font-body:    'Inter', sans-serif;
    --font-mono:    'JetBrains Mono', monospace;

    --radius: 18px;
    --radius-sm: 10px;
}

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html{
    scroll-behavior:smooth;
}

body{
    width:100%;
    max-width:1240px;
    margin:auto;
    padding:0 24px;
    font-family:var(--font-body);
    background:var(--bg);
    color:var(--text);
    position:relative;
    overflow-x:hidden;
}

/* faint global grid + glow backdrop */
body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:-2;
    background:
        radial-gradient(circle at 12% 8%, rgba(41,224,255,0.10), transparent 40%),
        radial-gradient(circle at 88% 18%, rgba(139,125,255,0.10), transparent 45%),
        radial-gradient(circle at 50% 100%, rgba(41,224,255,0.06), transparent 50%),
        var(--bg);
}
body::after{
    content:"";
    position:fixed;
    inset:0;
    z-index:-1;
    opacity:.35;
    background-image:
        linear-gradient(rgba(148,163,196,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148,163,196,0.05) 1px, transparent 1px);
    background-size:42px 42px;
    mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 90%);
}

::selection{
    background:var(--cyan);
    color:#04101a;
}

::-webkit-scrollbar{ width:10px; }
::-webkit-scrollbar-track{ background:var(--bg); }
::-webkit-scrollbar-thumb{ background:var(--panel-2); border-radius:10px; border:2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover{ background:var(--border-strong); }

a{ color:inherit; }

.eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-family:var(--font-mono);
    font-size:12.5px;
    letter-spacing:.14em;
    text-transform:uppercase;
    color:var(--cyan);
}
.eyebrow::before{
    content:"";
    width:7px;
    height:7px;
    border-radius:50%;
    background:var(--cyan);
    box-shadow:0 0 10px 2px rgba(41,224,255,.7);
}

/* ---------------- Header / Nav ---------------- */
header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:18px 28px;
    margin-top:22px;
    background:rgba(15,24,48,0.55);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border:1px solid var(--border);
    border-radius:16px;
    position:sticky;
    top:16px;
    z-index:100;
}

header h1{
    font-family:var(--font-display);
    font-size:24px;
    font-weight:700;
    letter-spacing:.01em;
    color:var(--text);
    display:flex;
    align-items:center;
    gap:2px;
}
header h1 .dot{
    color:var(--cyan);
}
header h1 .cursor{
    display:inline-block;
    width:2px;
    height:1em;
    margin-left:6px;
    background:var(--cyan);
    animation:blinkCursor 1.1s steps(1) infinite;
}
@keyframes blinkCursor{ 50%{ opacity:0; } }

nav ul{
    display:flex;
    list-style:none;
    gap:6px;
}

nav ul li a{
    display:flex;
    align-items:center;
    gap:8px;
    text-decoration:none;
    color:var(--text-dim);
    font-size:14.5px;
    font-weight:500;
    padding:9px 16px;
    border-radius:10px;
    transition:.25s ease;
    position:relative;
}

nav ul li a i{
    font-size:13px;
    color:var(--text-faint);
    transition:.25s ease;
}

nav ul li a:hover,
nav ul li a.active{
    color:var(--text);
    background:var(--panel);
}
nav ul li a:hover i,
nav ul li a.active i{
    color:var(--cyan);
}
nav ul li a.active{
    box-shadow:inset 0 0 0 1px var(--border-strong);
}

.nav-toggle{
    display:none;
    flex-direction:column;
    gap:5px;
    background:none;
    border:none;
    cursor:pointer;
    padding:8px;
}
.nav-toggle span{
    width:22px;
    height:2px;
    background:var(--text);
    border-radius:2px;
    transition:.3s;
}

/* ---------------- Buttons ---------------- */
.btn{
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:14px 26px;
    border-radius:12px;
    font-family:var(--font-body);
    font-weight:600;
    font-size:15px;
    text-decoration:none;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
}
.btn svg{ transition:transform .25s ease; }
.btn:hover svg{ transform:translateX(3px); }

.btn-primary{
    background:var(--grad);
    color:#04101a;
    box-shadow:0 8px 24px rgba(41,224,255,0.18);
}
.btn-primary:hover{
    transform:translateY(-3px);
    box-shadow:0 12px 30px rgba(41,224,255,0.3);
}

.btn-secondary{
    background:rgba(255,255,255,0.02);
    color:var(--text);
    border:1px solid var(--border-strong);
}
.btn-secondary:hover{
    transform:translateY(-3px);
    border-color:var(--cyan);
    color:var(--cyan);
    background:rgba(41,224,255,0.06);
}

/* ---------------- Glass panel utility ---------------- */
.panel{
    background:linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01));
    border:1px solid var(--border);
    border-radius:var(--radius);
    position:relative;
}
.panel::before{
    content:"";
    position:absolute;
    inset:0;
    border-radius:inherit;
    padding:1px;
    background:var(--grad-soft);
    -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite:xor;
    mask-composite:exclude;
    opacity:0;
    transition:opacity .35s ease;
    pointer-events:none;
}

/* ---------------- Scroll reveal ---------------- */
.reveal{
    opacity:0;
    transform:translateY(26px);
    transition:opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1);
}
.reveal.is-visible{
    opacity:1;
    transform:translateY(0);
}

/* ---------------- Footer ---------------- */
footer{
    margin-top:60px;
    margin-bottom:26px;
    background:rgba(15,24,48,0.45);
    backdrop-filter:blur(10px);
    text-align:center;
    padding:26px 20px;
    border-radius:16px;
    border:1px solid var(--border);
    color:var(--text-faint);
    font-size:13.5px;
}
footer .foot-links{
    display:flex;
    justify-content:center;
    gap:22px;
    margin-bottom:16px;
    font-family:var(--font-mono);
    font-size:13px;
}
footer .foot-links a{
    text-decoration:none;
    color:var(--text-dim);
    transition:.25s;
}
footer .foot-links a:hover{ color:var(--cyan); }

footer hr{
    border:none;
    border-top:1px solid var(--border);
    margin-bottom:16px;
}

footer p{
    font-family:var(--font-mono);
    letter-spacing:.02em;
}

/* ---------------- Back to top ---------------- */
.to-top{
    position:fixed;
    right:26px;
    bottom:26px;
    width:46px;
    height:46px;
    border-radius:50%;
    background:var(--panel);
    border:1px solid var(--border-strong);
    color:var(--cyan);
    display:flex;
    align-items:center;
    justify-content:center;
    cursor:pointer;
    opacity:0;
    pointer-events:none;
    transform:translateY(10px);
    transition:.3s ease;
    z-index:200;
    font-size:16px;
}
.to-top.show{
    opacity:1;
    pointer-events:auto;
    transform:translateY(0);
}
.to-top:hover{
    border-color:var(--cyan);
    box-shadow:0 0 16px rgba(41,224,255,.35);
}

/* ---------------- Responsive header ---------------- */
@media (max-width:820px){
    nav{
        position:fixed;
        top:0; right:0;
        height:100vh;
        width:min(78vw,300px);
        background:rgba(7,11,20,0.98);
        border-left:1px solid var(--border);
        transform:translateX(100%);
        transition:transform .35s ease;
        z-index:150;
        padding:100px 30px;
    }
    nav.open{ transform:translateX(0); }
    nav ul{
        flex-direction:column;
        gap:6px;
    }
    nav ul li a{ font-size:16px; padding:14px 16px; }
    .nav-toggle{ display:flex; }
}

/* ================= HERO ================= */
main{ position:relative; }

.hero{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:50px;
    padding:90px 20px 60px;
    flex-wrap:wrap;
    position:relative;
    min-height:auto;
}

.hero-text{
    max-width:560px;
    flex:1 1 420px;
}

.hero-greeting{
    font-family:var(--font-mono);
    font-size:14px;
    color:var(--text-dim);
    margin-bottom:14px;
}

.hero-name{
    font-family:var(--font-display);
    font-size:clamp(3rem,7vw,5.4rem);
    line-height:1;
    font-weight:700;
    background:var(--grad);
    -webkit-background-clip:text;
    background-clip:text;
    -webkit-text-fill-color:transparent;
    margin:6px 0 18px;
}

.hero-role{
    font-family:var(--font-mono);
    font-size:1.15rem;
    font-weight:500;
    color:var(--text);
    margin-bottom:20px;
    min-height:1.6em;
    border-left:2px solid var(--cyan);
    padding-left:12px;
}
.hero-role::after{
    content:"";
    display:inline-block;
    width:2px;
    height:1em;
    background:var(--cyan);
    margin-left:3px;
    vertical-align:middle;
    animation:blinkCursor .9s steps(1) infinite;
}

.hero-desc{
    font-size:1rem;
    line-height:1.8;
    color:var(--text-dim);
    margin-bottom:34px;
    max-width:520px;
}

.hero-buttons{
    display:flex;
    gap:16px;
    flex-wrap:wrap;
    margin-bottom:36px;
}

.hero-socials{
    display:flex;
    gap:14px;
}
.hero-socials a{
    width:42px;
    height:42px;
    border-radius:11px;
    display:flex;
    align-items:center;
    justify-content:center;
    border:1px solid var(--border-strong);
    color:var(--text-dim);
    text-decoration:none;
    transition:.25s ease;
}
.hero-socials a:hover{
    color:var(--cyan);
    border-color:var(--cyan);
    background:rgba(41,224,255,0.08);
    transform:translateY(-3px);
}

/* -------- image / neural canvas -------- */
.hero-image-wrap{
    position:relative;
    flex-shrink:0;
    width:400px;
    height:400px;
    display:flex;
    align-items:center;
    justify-content:center;
}

#neural-canvas{
    position:absolute;
    inset:-40px;
    width:calc(100% + 80px);
    height:calc(100% + 80px);
    z-index:0;
}

.hero-ring{
    position:absolute;
    inset:-14px;
    border-radius:50%;
    border:1px dashed var(--border-strong);
    animation:spin 26s linear infinite;
}
@keyframes spin{ to{ transform:rotate(360deg); } }

.hero-image{
    width:320px;
    height:320px;
    border-radius:50%;
    overflow:hidden;
    border:3px solid var(--panel-2);
    box-shadow:0 0 0 10px rgba(41,224,255,0.05), 0 20px 60px rgba(0,0,0,.5);
    position:relative;
    z-index:1;
}
.hero-image img{
    width:100%;
    height:100%;
    object-fit:cover;
    display:block;
    filter:saturate(1.05) contrast(1.03);
}

.float-chip{
    position:absolute;
    display:flex;
    align-items:center;
    gap:10px;
    padding:10px 16px;
    font-family:var(--font-mono);
    font-size:12.5px;
    background:rgba(15,24,48,0.85);
    backdrop-filter:blur(10px);
    border:1px solid var(--border-strong);
    border-radius:12px;
    z-index:2;
    animation:floaty 5s ease-in-out infinite;
}
.float-chip i{ color:var(--cyan); }
.chip-1{ top:8%; left:-14%; animation-delay:0s; }
.chip-2{ bottom:10%; right:-16%; animation-delay:1.2s; }

@keyframes floaty{
    0%,100%{ transform:translateY(0); }
    50%{ transform:translateY(-10px); }
}

/* -------- scroll cue -------- */
.scroll-cue{
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:8px;
    width:fit-content;
    margin:10px auto 40px;
    color:var(--text-faint);
    font-family:var(--font-mono);
    font-size:11px;
    letter-spacing:.12em;
    text-transform:uppercase;
}
.scroll-cue .line{
    width:1px;
    height:34px;
    background:linear-gradient(var(--cyan), transparent);
    animation:scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine{
    0%{ transform:scaleY(0); transform-origin:top; }
    50%{ transform:scaleY(1); transform-origin:top; }
    50.01%{ transform-origin:bottom; }
    100%{ transform:scaleY(0); transform-origin:bottom; }
}

/* ================= MARQUEE / STACK STRIP ================= */
.stack-strip{
    margin-top:10px;
    padding:26px 0;
    border-top:1px solid var(--border);
    border-bottom:1px solid var(--border);
    overflow:hidden;
    position:relative;
}
.stack-strip::before,
.stack-strip::after{
    content:"";
    position:absolute;
    top:0; bottom:0;
    width:80px;
    z-index:2;
}
.stack-strip::before{ left:0; background:linear-gradient(90deg, var(--bg), transparent); }
.stack-strip::after{ right:0; background:linear-gradient(270deg, var(--bg), transparent); }

.marquee{
    display:flex;
    gap:50px;
    width:max-content;
    animation:marquee 26s linear infinite;
}
.marquee span{
    display:flex;
    align-items:center;
    gap:10px;
    font-family:var(--font-mono);
    font-size:14px;
    color:var(--text-dim);
    white-space:nowrap;
}
.marquee span i{ color:var(--cyan); font-size:15px; }
@keyframes marquee{
    from{ transform:translateX(0); }
    to{ transform:translateX(-50%); }
}

/* ================= PREVIEW SECTION ================= */
.preview-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:22px;
    margin:60px 0 20px;
}
.preview-card{
    padding:30px;
    transition:.3s ease;
}
.preview-card:hover{
    transform:translateY(-6px);
    border-color:var(--border-strong);
}
.preview-card:hover::before{ opacity:1; }
.preview-card i{
    font-size:26px;
    color:var(--cyan);
    margin-bottom:16px;
    display:block;
}
.preview-card h3{
    font-family:var(--font-display);
    font-size:19px;
    margin-bottom:10px;
}
.preview-card p{
    font-size:14px;
    line-height:1.7;
    color:var(--text-dim);
    margin-bottom:18px;
}
.preview-card a{
    font-family:var(--font-mono);
    font-size:13px;
    color:var(--cyan);
    text-decoration:none;
    display:inline-flex;
    align-items:center;
    gap:6px;
}
.preview-card a:hover{ text-decoration:underline; }

.section-head{
    text-align:center;
    margin:70px 0 10px;
}
.section-head h2{
    font-family:var(--font-display);
    font-size:clamp(1.8rem,3.6vw,2.5rem);
    margin:10px 0 12px;
}
.section-head p{
    color:var(--text-dim);
    max-width:520px;
    margin:0 auto;
    font-size:15px;
}

@media (max-width:900px){
    .hero{ flex-direction:column; text-align:center; padding:70px 10px 40px; }
    .hero-role{ margin-left:auto; margin-right:auto; }
    .hero-buttons, .hero-socials{ justify-content:center; }
    .hero-desc{ margin-left:auto; margin-right:auto; }
    .hero-image-wrap{ width:280px; height:280px; }
    .hero-image{ width:230px; height:230px; }
    .float-chip{ display:none; }
    .preview-grid{ grid-template-columns:1fr; }
}