/* ============================================================
   Shubham Kumar Gupta - Portfolio
   Systems-engineer aesthetic · dark · animated
   ============================================================ */

:root {
    --bg:        #0a0b0f;
    --bg-2:      #10121a;
    --surface:   #14161f;
    --surface-2: #1a1d29;
    --border:    rgba(255, 255, 255, 0.08);
    --border-hi: rgba(255, 255, 255, 0.16);
    --text:      #e7ebf3;
    --text-dim:  #9aa4b8;
    --text-mute: #6b7488;

    --accent:    #00e5ff;   /* cyan */
    --accent-2:  #7c5cff;   /* violet */
    --accent-3:  #22e584;   /* green */
    --grad:      linear-gradient(120deg, var(--accent), var(--accent-2));
    --grad-warm: linear-gradient(120deg, var(--accent-3), var(--accent));

    --radius:    16px;
    --radius-sm: 10px;
    --shadow:    0 20px 60px rgba(0, 0, 0, 0.5);
    --mono:      'JetBrains Mono', ui-monospace, monospace;
    --sans:      'Inter', system-ui, sans-serif;
    --display:   'Space Grotesk', var(--sans);
    --max:       1120px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
strong { color: #fff; font-weight: 600; }
::selection { background: var(--accent); color: #041014; }

/* ---------- Animated background ---------- */
.bg-grid, .bg-orb, .bg-noise {
    position: fixed;
    inset: 0;
    z-index: -3;
    pointer-events: none;
}
.bg-grid {
    background-image:
        linear-gradient(to right, rgba(255,255,255,0.035) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.035) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}
.bg-orb {
    z-index: -2;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.5;
}
.bg-orb--1 {
    width: 520px; height: 520px;
    background: radial-gradient(circle, var(--accent-2), transparent 70%);
    top: -140px; left: -120px;
    animation: drift1 22s ease-in-out infinite;
}
.bg-orb--2 {
    width: 460px; height: 460px;
    background: radial-gradient(circle, var(--accent), transparent 70%);
    top: 30%; right: -140px;
    animation: drift2 26s ease-in-out infinite;
}
@keyframes drift1 { 50% { transform: translate(80px, 60px) scale(1.15); } }
@keyframes drift2 { 50% { transform: translate(-60px, 90px) scale(1.1); } }

/* ---------- Scroll progress ---------- */
.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px; width: 0%;
    background: var(--grad);
    z-index: 100;
    box-shadow: 0 0 12px var(--accent);
}

/* ---------- Navbar ---------- */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 90;
    transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
    border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
    background: rgba(10, 11, 15, 0.72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom-color: var(--border);
}
.nav__inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav__brand {
    font-family: var(--mono);
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: 0.5px;
}
.nav__brand-bracket { color: var(--accent); }
.nav__links { display: flex; gap: 6px; align-items: center; margin-left: auto; }
.nav__link {
    font-size: 0.92rem;
    color: var(--text-dim);
    padding: 8px 14px;
    border-radius: 8px;
    transition: color 0.2s, background 0.2s;
}
.nav__link:hover { color: #fff; background: rgba(255,255,255,0.06); }
.nav__link--cta {
    background: var(--grad);
    color: #041014;
    font-weight: 600;
}
.nav__link--cta:hover { color: #041014; filter: brightness(1.1); }
.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav__toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: 0.3s; }

/* ---------- Hero ---------- */
.hero {
    min-height: 100vh;
    max-width: var(--max);
    margin: 0 auto;
    padding: 130px 24px 60px;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 50px;
    align-items: center;
    position: relative;
}
.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    color: var(--text-dim);
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 7px 14px;
    border-radius: 999px;
    margin-bottom: 26px;
}
.hero__badge-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--accent-3);
    box-shadow: 0 0 10px var(--accent-3);
    animation: pulse 2s infinite;
}
@keyframes pulse { 50% { opacity: 0.3; transform: scale(0.8); } }

.hero__title {
    font-family: var(--display);
    font-size: clamp(2.6rem, 6vw, 4.4rem);
    line-height: 1.02;
    font-weight: 700;
    letter-spacing: -1.5px;
    margin-bottom: 18px;
}
.hero__title-accent {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero__role {
    font-family: var(--mono);
    font-size: clamp(1rem, 2.2vw, 1.35rem);
    color: var(--accent);
    margin-bottom: 22px;
    min-height: 1.6em;
}
.hero__role-prompt { color: var(--accent-3); margin-right: 8px; }
.hero__cursor { animation: blink 1s steps(1) infinite; color: var(--accent); }
@keyframes blink { 50% { opacity: 0; } }

.hero__tagline {
    color: var(--text-dim);
    font-size: 1.05rem;
    max-width: 520px;
    margin-bottom: 30px;
}
.hero__tagline strong { color: var(--text); }

.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 13px 24px;
    border-radius: 12px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
.btn--primary {
    background: var(--grad);
    color: #041014;
    box-shadow: 0 8px 26px rgba(0, 229, 255, 0.25);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(0, 229, 255, 0.4); }
.btn--ghost {
    background: var(--surface);
    border-color: var(--border-hi);
    color: var(--text);
}
.btn--ghost:hover { transform: translateY(-3px); border-color: var(--accent); color: #fff; }

.hero__socials { display: flex; gap: 18px; font-size: 1.3rem; color: var(--text-mute); }
.hero__socials a { transition: color 0.2s, transform 0.2s; }
.hero__socials a:hover { color: var(--accent); transform: translateY(-3px); }

/* Terminal */
.hero__terminal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transform: perspective(1400px) rotateY(-7deg) rotateX(2deg);
    transition: transform 0.5s ease;
}
.hero__terminal:hover { transform: perspective(1400px) rotateY(0deg) rotateX(0deg); }
.terminal__bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--surface-2);
    border-bottom: 1px solid var(--border);
}
.terminal__dot { width: 12px; height: 12px; border-radius: 50%; }
.terminal__dot--red { background: #ff5f57; }
.terminal__dot--yellow { background: #febc2e; }
.terminal__dot--green { background: #28c840; }
.terminal__title { margin-left: 12px; font-family: var(--mono); font-size: 0.78rem; color: var(--text-mute); }
.terminal__body {
    padding: 20px;
    font-family: var(--mono);
    font-size: 0.82rem;
    line-height: 1.75;
    color: var(--text-dim);
    overflow-x: auto;
}
.tok-c   { color: var(--accent-3); }
.tok-cmd { color: var(--accent); }
.tok-k   { color: #ff9edb; }
.tok-s   { color: #b6f09c; }
.tok-n   { color: #ffca6b; }
.tok-blink { animation: blink 1s steps(1) infinite; color: var(--accent); }

/* Scroll indicator */
.hero__scroll {
    position: absolute;
    bottom: 24px; left: 50%;
    transform: translateX(-50%);
}
.hero__scroll-mouse {
    display: block;
    width: 24px; height: 40px;
    border: 2px solid var(--text-mute);
    border-radius: 14px;
    position: relative;
}
.hero__scroll-mouse::before {
    content: '';
    position: absolute;
    top: 8px; left: 50%;
    width: 4px; height: 8px;
    background: var(--accent);
    border-radius: 2px;
    transform: translateX(-50%);
    animation: scroll-wheel 1.6s infinite;
}
@keyframes scroll-wheel { 0% { opacity: 0; top: 8px; } 40% { opacity: 1; } 80% { opacity: 0; top: 20px; } }

/* ---------- Sections ---------- */
.section {
    max-width: var(--max);
    margin: 0 auto;
    padding: 80px 24px;
}
.section__head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 44px; }
.section__index {
    font-family: var(--mono);
    font-size: 0.95rem;
    color: var(--accent);
    opacity: 0.8;
}
.section__title {
    font-family: var(--display);
    font-size: clamp(1.7rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.5px;
    position: relative;
}
.section__title::after {
    content: '';
    position: absolute;
    left: 0; bottom: -10px;
    width: 54px; height: 3px;
    background: var(--grad);
    border-radius: 3px;
}

.grad-text {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 600;
}

/* ---------- About ---------- */
.about {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 46px;
    align-items: center;
}
.about__photo-frame {
    position: relative;
    border-radius: 20px;
    padding: 6px;
    background: var(--grad);
    box-shadow: var(--shadow);
}
.about__photo-frame img {
    width: 100%;
    display: block;
    border-radius: 15px;
    aspect-ratio: 1 / 1;
    object-fit: cover;
}
.about__body p { color: var(--text-dim); margin-bottom: 16px; }

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-top: 28px;
}
.stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 18px 12px;
    text-align: center;
    transition: transform 0.25s, border-color 0.25s;
}
.stat:hover { transform: translateY(-4px); border-color: var(--accent); }
.stat__num {
    display: block;
    font-family: var(--display);
    font-size: 1.85rem;
    font-weight: 700;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat__label { font-size: 0.76rem; color: var(--text-mute); letter-spacing: 0.3px; }

/* ---------- Skills ---------- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}
.skill-cat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    transition: border-color 0.25s, transform 0.25s;
}
.skill-cat:hover { border-color: var(--border-hi); transform: translateY(-3px); }
.skill-cat__title {
    font-family: var(--display);
    font-size: 1.08rem;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.skill-cat__title i { color: var(--accent); }

.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-dim);
    background: var(--surface-2);
    border: 1px solid var(--border);
    padding: 8px 13px;
    border-radius: 999px;
    transition: transform 0.2s, border-color 0.2s, color 0.2s, box-shadow 0.2s;
}
.chip:hover { transform: translateY(-3px); color: #fff; border-color: var(--accent); }
.chip i { color: var(--accent); }
.chip__ico { width: 16px; height: 16px; filter: invert(1) brightness(1.4); }
.chip--hot {
    background: linear-gradient(120deg, rgba(0,229,255,0.10), rgba(124,92,255,0.10));
    border-color: rgba(0, 229, 255, 0.3);
    color: var(--text);
}
.chip--hot:hover { box-shadow: 0 6px 20px rgba(0, 229, 255, 0.22); }

/* ---------- Projects ---------- */
.projects {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}
.pcard {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.pcard::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 0%), rgba(0,229,255,0.10), transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}
.pcard:hover { transform: translateY(-8px); border-color: var(--border-hi); box-shadow: var(--shadow); }
.pcard:hover::before { opacity: 1; }
.pcard__top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.pcard__icon { font-size: 1.7rem; color: var(--accent); }
.pcard__link { color: var(--text-mute); font-size: 1.25rem; transition: color 0.2s, transform 0.2s; }
.pcard__link:hover { color: #fff; transform: scale(1.15); }
.pcard__title { font-family: var(--display); font-size: 1.3rem; margin-bottom: 10px; }
.pcard__desc { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 18px; }
.pcard__tags { display: flex; flex-wrap: wrap; gap: 8px; }
.pcard__tags span {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--accent);
    background: rgba(0, 229, 255, 0.08);
    border: 1px solid rgba(0, 229, 255, 0.2);
    padding: 4px 10px;
    border-radius: 6px;
}

/* ---------- Timeline ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
    content: '';
    position: absolute;
    left: 7px; top: 6px; bottom: 6px;
    width: 2px;
    background: linear-gradient(var(--accent), var(--accent-2), transparent);
}
.tl-item { position: relative; margin-bottom: 26px; }
.tl-item__dot {
    position: absolute;
    left: -34px; top: 6px;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--bg);
    border: 3px solid var(--accent);
    box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.12);
}
.tl-item__card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 26px;
    transition: transform 0.25s, border-color 0.25s;
}
.tl-item__card:hover { transform: translateX(6px); border-color: var(--border-hi); }
.tl-item__meta { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px; margin-bottom: 4px; }
.tl-item__role { font-family: var(--display); font-size: 1.12rem; font-weight: 600; }
.tl-item__date { font-family: var(--mono); font-size: 0.8rem; color: var(--text-mute); }
.tl-item__co { color: var(--accent); font-weight: 600; margin-bottom: 10px; }
.tl-item__card p { color: var(--text-dim); font-size: 0.92rem; }

.tl-item__points { list-style: none; margin: 12px 0 14px; display: grid; gap: 8px; }
.tl-item__points li {
    position: relative;
    padding-left: 22px;
    color: var(--text-dim);
    font-size: 0.9rem;
    line-height: 1.6;
}
.tl-item__points li::before {
    content: '▹';
    position: absolute;
    left: 0; top: 0;
    color: var(--accent);
}
.tl-item__points strong { color: var(--text); }
.tl-item__stack { display: flex; flex-wrap: wrap; gap: 7px; }
.tl-item__stack span {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--accent-3);
    background: rgba(34, 229, 132, 0.07);
    border: 1px solid rgba(34, 229, 132, 0.2);
    padding: 3px 9px;
    border-radius: 6px;
}

/* ---------- Profiles ---------- */
.profiles {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
.profile-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    font-weight: 600;
    transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.profile-card:hover { transform: translateY(-8px); border-color: var(--accent); box-shadow: var(--shadow); }
.profile-card__ico { width: 46px; height: 46px; filter: invert(1) brightness(1.3); }
.profile-card__ico--text {
    display: flex; align-items: center; justify-content: center;
    font-family: var(--display); font-weight: 700; font-size: 2rem;
    color: var(--accent); filter: none;
}

/* ---------- Contact ---------- */
.contact { text-align: center; }
.contact__lead {
    font-family: var(--display);
    font-size: clamp(1.3rem, 3vw, 2rem);
    margin-bottom: 34px;
    color: var(--text);
}
.contact__grid { display: flex; justify-content: center; flex-wrap: wrap; gap: 16px; }
.contact__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 120px;
    padding: 22px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-dim);
    font-size: 0.85rem;
    transition: transform 0.25s, border-color 0.25s, color 0.25s;
}
.contact__item i { font-size: 1.6rem; color: var(--accent); transition: transform 0.25s; }
.contact__item:hover { transform: translateY(-6px); border-color: var(--accent); color: #fff; }
.contact__item:hover i { transform: scale(1.15); }

/* ---------- Footer ---------- */
.footer {
    text-align: center;
    padding: 40px 24px;
    border-top: 1px solid var(--border);
    color: var(--text-mute);
    font-size: 0.88rem;
}
.footer__note { font-family: var(--mono); font-size: 0.78rem; margin-top: 6px; color: var(--accent); opacity: 0.7; }

/* ---------- Network canvas + cursor glow ---------- */
.bg-net {
    position: fixed;
    inset: 0;
    width: 100%; height: 100%;
    z-index: -1;
    pointer-events: none;
    opacity: 0.55;
}
.cursor-glow {
    position: fixed;
    top: 0; left: 0;
    width: 520px; height: 520px;
    margin: -260px 0 0 -260px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.09), rgba(124, 92, 255, 0.05) 40%, transparent 70%);
    pointer-events: none;
    z-index: -1;
    transition: opacity 0.4s;
    opacity: 0;
    will-change: transform;
}
.cursor-glow.is-on { opacity: 1; }

/* ---------- Animated gradients ---------- */
@property --angle { syntax: '<angle>'; initial-value: 0deg; inherits: false; }
@keyframes spin-angle { to { --angle: 360deg; } }
@keyframes shimmer { to { background-position: 200% center; } }

.hero__title-accent {
    background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3), var(--accent));
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    animation: shimmer 6s linear infinite;
    filter: drop-shadow(0 0 24px rgba(0, 229, 255, 0.25));
}

/* Glowing rotating border on the terminal */
.hero__terminal { position: relative; border-color: transparent; }
.hero__terminal::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    padding: 1px;
    background: conic-gradient(from var(--angle), transparent 0 60%, var(--accent) 75%, var(--accent-2) 90%, transparent);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: spin-angle 5s linear infinite;
    pointer-events: none;
}
.hero__terminal { box-shadow: var(--shadow), 0 0 60px rgba(0, 229, 255, 0.12); }

/* Section index as a code comment */
.section__index::before { content: '// '; color: var(--text-mute); }

/* ---------- Tech marquee ---------- */
.marquee {
    overflow: hidden;
    border-block: 1px solid var(--border);
    background: rgba(20, 22, 31, 0.6);
    backdrop-filter: blur(6px);
    padding: 14px 0;
    mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.marquee__track {
    display: flex;
    gap: 46px;
    width: max-content;
    animation: marquee 32s linear infinite;
}
.marquee__track span {
    font-family: var(--mono);
    font-size: 0.95rem;
    color: var(--text-mute);
    white-space: nowrap;
}
.marquee__track span::before { content: '◆'; color: var(--accent); margin-right: 46px; font-size: 0.6rem; vertical-align: middle; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Featured project ---------- */
.pcard--featured {
    grid-column: 1 / -1;
    border-color: transparent;
    background:
        linear-gradient(var(--surface), var(--surface)) padding-box,
        conic-gradient(from var(--angle), var(--accent), var(--accent-2), var(--accent-3), var(--accent)) border-box;
    border: 1px solid transparent;
    animation: spin-angle 8s linear infinite;
    box-shadow: 0 0 50px rgba(124, 92, 255, 0.15);
}
.pcard--featured .pcard__title { font-size: 1.7rem; display: flex; align-items: center; gap: 12px; }
.pcard--featured .pcard__desc { font-size: 0.98rem; max-width: 640px; }
.pcard__badge {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: #041014;
    background: var(--grad);
    padding: 5px 12px;
    border-radius: 999px;
    font-weight: 600;
}
.pcard__featured-body {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 30px;
    align-items: center;
}
.pcard__metrics { display: grid; gap: 12px; min-width: 170px; }
.metric {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 18px;
    display: flex;
    flex-direction: column;
}
.metric__num {
    font-family: var(--display);
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1.2;
    background: var(--grad-warm);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.metric__label { font-family: var(--mono); font-size: 0.72rem; color: var(--text-mute); }

/* 3D tilt (set by JS) */
.tilt { transform-style: preserve-3d; will-change: transform; }
.pcard.tilt:hover, .skill-cat.tilt:hover {
    transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(-6px);
}
.projects { grid-template-columns: repeat(2, 1fr); }

/* ---------- Interactive terminal ---------- */
.terminal__body { height: 340px; overflow-y: auto; cursor: text; }
.terminal__out pre { font: inherit; white-space: pre-wrap; margin: 0; }
.terminal__out .term-line { white-space: pre-wrap; margin: 2px 0; }
.terminal__out .term-cmd { color: var(--text); margin-top: 8px; }
.terminal__out a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.term-hint { color: var(--text-mute); margin-top: 6px; }
.term-err { color: #ff6b81; }
.terminal__prompt { display: flex; align-items: center; gap: 10px; margin-top: 6px; }
.terminal__prompt input {
    flex: 1;
    background: transparent;
    border: 0;
    outline: 0;
    color: var(--text);
    font: inherit;
    caret-color: var(--accent);
}
.terminal__prompt input::placeholder { color: var(--text-mute); opacity: 0.6; }

/* ---------- ⌘K button + palette ---------- */
.nav__kbd {
    display: inline-flex;
    gap: 3px;
    margin-left: 10px;
    background: var(--surface);
    border: 1px solid var(--border-hi);
    border-radius: 8px;
    padding: 5px 7px;
    cursor: pointer;
    transition: border-color 0.2s;
}
.nav__kbd:hover { border-color: var(--accent); }
kbd {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--text-dim);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 1px 6px;
}
.palette { position: fixed; inset: 0; z-index: 200; display: flex; justify-content: center; align-items: flex-start; padding: 14vh 16px 16px; }
.palette[hidden] { display: none; }
.palette__backdrop { position: absolute; inset: 0; background: rgba(5, 6, 9, 0.7); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.palette__box {
    position: relative;
    width: 100%;
    max-width: 560px;
    background: var(--surface);
    border: 1px solid var(--border-hi);
    border-radius: var(--radius);
    box-shadow: var(--shadow), 0 0 80px rgba(0, 229, 255, 0.12);
    overflow: hidden;
    animation: pop 0.18s ease-out;
}
@keyframes pop { from { transform: translateY(-8px) scale(0.98); opacity: 0; } }
.palette__search { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--border); color: var(--text-mute); }
.palette__search input { flex: 1; background: transparent; border: 0; outline: 0; color: var(--text); font: 1rem var(--sans); }
.palette__list { list-style: none; max-height: 340px; overflow-y: auto; padding: 8px; }
.palette__item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 10px;
    color: var(--text-dim);
    cursor: pointer;
    font-size: 0.93rem;
}
.palette__item i { width: 18px; text-align: center; color: var(--accent); }
.palette__item small { margin-left: auto; font-family: var(--mono); font-size: 0.7rem; color: var(--text-mute); }
.palette__item.is-active { background: linear-gradient(120deg, rgba(0,229,255,0.12), rgba(124,92,255,0.12)); color: #fff; }
.palette__empty { padding: 18px; text-align: center; color: var(--text-mute); font-size: 0.9rem; }
.palette__foot { display: flex; gap: 18px; padding: 10px 18px; border-top: 1px solid var(--border); font-size: 0.75rem; color: var(--text-mute); }

/* ---------- Live activity ---------- */
.activity {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
}
.activity__head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.activity__head h3 { font-family: var(--display); font-size: 1.08rem; display: flex; gap: 10px; align-items: center; }
.activity__head h3 i { color: var(--accent-3); }
.activity__note { font-family: var(--mono); font-size: 0.75rem; color: var(--text-mute); }
.activity__chart { display: block; overflow-x: auto; margin-bottom: 18px; }
/* ghchart renders light: invert + rotate hue keeps the cyan and makes empty cells dark */
.activity__chart img { width: 100%; min-width: 640px; display: block; filter: invert(1) hue-rotate(180deg) brightness(0.95); }
.activity__cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: center; }
.activity__cards img { width: 100%; display: block; border-radius: var(--radius-sm); }

/* ---------- NyayaAI extras ---------- */
.pcard__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.btn--sm { padding: 9px 16px; font-size: 0.85rem; border-radius: 10px; }
.pcard__diagram { margin-top: 24px; }
.pcard__diagram img { width: 100%; display: block; background: #fff; border-radius: var(--radius-sm); padding: 12px; }
.pcard__diagram figcaption { font-family: var(--mono); font-size: 0.72rem; color: var(--text-mute); margin-top: 8px; }

/* ---------- System view in experience ---------- */
.sysflow {
    background: var(--bg-2);
    border: 1px dashed var(--border-hi);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    margin-bottom: 14px;
    display: grid;
    gap: 10px;
}
.sysflow__label { font-family: var(--mono); font-size: 0.7rem; color: var(--text-mute); }
.sysflow__row { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.sysflow__node {
    font-family: var(--mono);
    font-size: 0.74rem;
    color: var(--text-dim);
    background: var(--surface-2);
    border: 1px solid var(--border-hi);
    padding: 5px 10px;
    border-radius: 6px;
}
.sysflow__node--hot { color: var(--text); border-color: rgba(0, 229, 255, 0.45); box-shadow: 0 0 14px rgba(0, 229, 255, 0.12); }
.sysflow__edge {
    position: relative;
    width: 28px; height: 2px;
    background: linear-gradient(90deg, var(--accent-2), var(--accent));
    background-size: 200% 100%;
    animation: shimmer 1.6s linear infinite;
}
.sysflow__edge::after {
    content: '';
    position: absolute;
    right: -1px; top: -3px;
    border: 4px solid transparent;
    border-left: 6px solid var(--accent);
    border-right: 0;
}

/* ---------- Education & achievements ---------- */
.edu { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.edu__heading { font-family: var(--display); font-size: 1.08rem; display: flex; gap: 10px; align-items: center; margin-bottom: 16px; }
.edu__heading i { color: var(--accent); }
.edu__card, .achv {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 22px;
    margin-bottom: 14px;
    transition: transform 0.25s, border-color 0.25s;
}
.edu__card:hover, .achv:hover { transform: translateX(6px); border-color: var(--accent); }
.edu__meta { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.edu__school { font-weight: 600; }
.edu__card p, .achv p { color: var(--text-dim); font-size: 0.9rem; margin: 0; }
.achv { display: flex; gap: 16px; align-items: center; }
.achv__icon {
    flex: none;
    width: 42px; height: 42px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: var(--grad);
    color: #041014;
    font-size: 1.05rem;
}
.profile-card__ico--fa { font-size: 46px; width: auto; height: auto; filter: none; color: #fff; }

/* ---------- Reveal animation ---------- */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; padding-top: 110px; gap: 36px; }
    .hero__terminal { transform: none; }
    .about { grid-template-columns: 1fr; text-align: center; }
    .about__photo-frame { max-width: 260px; margin: 0 auto; }
    .skills-grid, .projects, .profiles, .edu, .activity__cards { grid-template-columns: 1fr; }
    .pcard__featured-body { grid-template-columns: 1fr; }
    .pcard__metrics { grid-template-columns: repeat(3, 1fr); min-width: 0; }
    .cursor-glow { display: none; }
    .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .nav__links {
        position: fixed;
        top: 66px; right: 16px; left: 16px;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        background: rgba(10, 11, 15, 0.96);
        backdrop-filter: blur(14px);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 14px;
        transform: translateY(-12px);
        opacity: 0;
        pointer-events: none;
        transition: 0.25s;
    }
    .nav__links.is-open { transform: none; opacity: 1; pointer-events: auto; }
    .nav__toggle { display: flex; }
    .nav__kbd { display: none; }
    .terminal__body { height: 300px; }
    .projects, .profiles { grid-template-columns: 1fr; }
    .pcard__metrics { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    .reveal { opacity: 1; transform: none; }
    html { scroll-behavior: auto; }
}