/* ============================================================
   Tirth Laheri — Portfolio
   Aesthetic: light "research-instrument / editorial"
   Type: Fraunces (display) · JetBrains Mono (mono) · Sora (body)
   ============================================================ */

:root {
    --ink:      #FBFAF6;   /* warm paper background */
    --ink-2:    #FFFFFF;   /* cards / panels */
    --ink-3:    #F1EFE8;
    --ivory:    #17191F;   /* primary text (near-black) */
    --muted:    #565E6B;   /* secondary text */
    --muted-2:  #8A91A0;   /* tertiary / metadata */
    --line:     rgba(20, 24, 33, 0.10);
    --line-2:   rgba(20, 24, 33, 0.18);
    --accent:   #0D9488;   /* deep teal */
    --accent-d: #0B7D72;
    --on-accent:#FFFFFF;   /* text on accent fills */
    --gold:     #B7791F;   /* sparing warm detail */
    --maxw: 1180px;

    --font-display: "Fraunces", Georgia, serif;
    --font-mono: "JetBrains Mono", ui-monospace, monospace;
    --font-body: "Sora", system-ui, sans-serif;

    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: var(--font-body);
    background: var(--ink);
    color: var(--ivory);
    line-height: 1.65;
    font-weight: 300;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

::selection { background: var(--accent); color: var(--on-accent); }

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- Atmospheric background layers ---------- */
.bg-grid, .bg-glow, .bg-grain { position: fixed; inset: 0; pointer-events: none; z-index: 0; }

.bg-grid {
    background-image:
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 64px 64px;
    -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 75%);
    mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 75%);
    opacity: 0.5;
}
.bg-glow {
    background:
        radial-gradient(52% 42% at 16% 0%, rgba(13, 148, 136, 0.10), transparent 70%),
        radial-gradient(46% 46% at 94% 6%, rgba(183, 121, 31, 0.07), transparent 70%),
        radial-gradient(60% 50% at 50% 100%, rgba(13, 148, 136, 0.05), transparent 70%);
}
.bg-grain {
    opacity: 0.035; mix-blend-mode: multiply;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* keep content above layers */
.navbar, header, main, .footer { position: relative; z-index: 1; }

/* ---------- Typography helpers ---------- */
.eyebrow {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1.4rem;
}
.section-title {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(2rem, 5vw, 3.2rem);
    letter-spacing: -0.01em;
    line-height: 1.05;
}

/* ---------- Navigation ---------- */
.navbar {
    position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
    padding: 22px 0;
    transition: padding 0.4s var(--ease), background 0.4s var(--ease), border-color 0.4s var(--ease);
    border-bottom: 1px solid transparent;
}
.navbar.scrolled {
    padding: 13px 0;
    background: rgba(251, 250, 246, 0.82);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    border-bottom: 1px solid var(--line);
}
.nav-content { display: flex; align-items: center; justify-content: space-between; }
.nav-brand { display: flex; align-items: center; gap: 12px; font-weight: 500; }
.nav-mark {
    font-family: var(--font-display);
    font-weight: 600; font-size: 1.05rem;
    color: var(--on-accent); background: var(--accent);
    width: 34px; height: 34px; border-radius: 9px;
    display: grid; place-items: center; letter-spacing: -0.02em;
}
.nav-brand-name { font-size: 0.95rem; letter-spacing: 0.01em; }
.nav-menu { display: flex; gap: 30px; align-items: center; }
.nav-link {
    font-family: var(--font-mono);
    font-size: 0.78rem; color: var(--muted);
    letter-spacing: 0.04em; position: relative;
    transition: color 0.3s var(--ease);
}
.nav-link::after {
    content: ""; position: absolute; left: 0; bottom: -6px;
    width: 0; height: 1px; background: var(--accent);
    transition: width 0.35s var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--ivory); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; width: 30px; height: 22px; position: relative; }
.nav-toggle span { position: absolute; left: 0; height: 2px; width: 100%; background: var(--ivory); transition: 0.3s var(--ease); }
.nav-toggle span:nth-child(1) { top: 0; }
.nav-toggle span:nth-child(2) { top: 10px; }
.nav-toggle span:nth-child(3) { top: 20px; }
.nav-toggle.active span:nth-child(1) { top: 10px; transform: rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { top: 10px; transform: rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { min-height: 100vh; display: flex; align-items: center; padding: 130px 0 80px; }
.hero-inner { position: relative; width: 100%; }
.hero-meta {
    display: flex; gap: 26px; flex-wrap: wrap;
    font-family: var(--font-mono); font-size: 0.72rem;
    color: var(--muted-2); letter-spacing: 0.12em; text-transform: uppercase;
    margin-bottom: 38px;
}
.hero-meta span { display: flex; align-items: center; gap: 8px; }
.hero-meta i { color: var(--accent); font-size: 0.8rem; }

.hero-top { display: grid; grid-template-columns: 1.45fr 0.72fr; gap: 56px; align-items: center; }

.hero-portrait { display: flex; justify-content: flex-end; opacity: 0; animation: heroUp 0.9s var(--ease) 0.45s forwards; }
.hero-portrait-frame {
    position: relative; width: 100%; max-width: 330px; aspect-ratio: 1 / 1;
    border-radius: 20px; overflow: hidden; border: 1px solid var(--line-2);
    box-shadow: 0 30px 70px -34px rgba(20,24,33,0.30), 0 0 0 6px rgba(13,148,136,0.06);
}
.hero-portrait-frame::after {
    content: ""; position: absolute; inset: 0; border-radius: 20px; pointer-events: none;
    background: linear-gradient(180deg, transparent 55%, rgba(11,14,20,0.55) 100%);
    box-shadow: inset 0 0 0 1px rgba(94,230,197,0.18);
}
.hero-portrait-frame img { width: 100%; height: 100%; object-fit: cover; filter: saturate(1.02) contrast(1.02); transition: transform 0.7s var(--ease); }
.hero-portrait-frame:hover img { transform: scale(1.04); }
.hero-portrait-tag {
    position: absolute; left: 14px; bottom: 12px; z-index: 2;
    font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.16em;
    color: var(--accent); text-transform: uppercase;
}

.hero-name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(3.2rem, 8.5vw, 6.6rem);
    line-height: 0.94; letter-spacing: -0.03em;
    margin: 0.2rem 0 0.4rem;
}
.hero-name .accent { color: var(--accent); font-style: italic; font-weight: 500; }
.hero-role {
    font-family: var(--font-mono);
    font-size: clamp(0.85rem, 2vw, 1.05rem);
    color: var(--ivory); letter-spacing: 0.02em; margin-bottom: 1.6rem;
}
.hero-role .sep { color: var(--accent); margin: 0 0.5rem; }
.hero-summary {
    max-width: 60ch; color: var(--muted);
    font-size: 1.06rem; line-height: 1.75; margin-bottom: 2.4rem;
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 30px; }
.btn {
    font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.04em;
    padding: 13px 22px; border-radius: 10px; border: 1px solid var(--line-2);
    display: inline-flex; align-items: center; gap: 10px;
    transition: all 0.3s var(--ease); color: var(--ivory); cursor: pointer;
}
.btn i { font-size: 0.9rem; }
.btn-primary { background: var(--accent); color: var(--on-accent); border-color: var(--accent); font-weight: 500; }
.btn-primary:hover { background: transparent; color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 12px 40px -12px var(--accent); transform: translateY(-2px); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

.hero-social { display: flex; gap: 16px; }
.social-link {
    width: 42px; height: 42px; border-radius: 10px;
    border: 1px solid var(--line); display: grid; place-items: center;
    color: var(--muted); transition: all 0.3s var(--ease);
}
.social-link:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-3px); }

.hero-stats {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 20px; margin-top: 64px; border-top: 1px solid var(--line); padding-top: 36px;
}
.stat-item { display: flex; flex-direction: column; gap: 6px; }
.stat-number { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 500; color: var(--ivory); line-height: 1; }
.stat-label { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted-2); }

.scroll-cue { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); width: 26px; height: 42px; border: 1px solid var(--line-2); border-radius: 14px; display: grid; place-items: start center; padding-top: 8px; }
.scroll-cue span { width: 4px; height: 8px; border-radius: 3px; background: var(--accent); animation: scrollDot 1.8s var(--ease) infinite; }
@keyframes scrollDot { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* ---------- Sections ---------- */
.section { padding: 110px 0; border-top: 1px solid var(--line); }
.section-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 56px; }
.section-index { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); letter-spacing: 0.1em; padding-top: 6px; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; }
.about-text p { color: var(--muted); font-size: 1.1rem; line-height: 1.85; margin-bottom: 1.3rem; }
.about-text p strong { color: var(--ivory); font-weight: 500; }
.about-highlights { display: flex; flex-direction: column; gap: 14px; }
.highlight-card {
    border: 1px solid var(--line); border-radius: 14px; padding: 22px 24px;
    background: linear-gradient(180deg, var(--ink-2), transparent);
    transition: all 0.35s var(--ease);
}
.highlight-card:hover { border-color: var(--line-2); transform: translateX(6px); }
.highlight-card i { color: var(--accent); font-size: 1.1rem; margin-bottom: 12px; }
.highlight-card h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.15rem; margin-bottom: 6px; }
.highlight-card p { color: var(--muted); font-size: 0.92rem; line-height: 1.6; }

/* ---------- Org logo badge ---------- */
.org-logo {
    width: 50px; height: 50px; border-radius: 12px; flex-shrink: 0;
    background: #fff; display: grid; place-items: center; overflow: hidden;
    border: 1px solid var(--line-2); box-shadow: 0 6px 16px -10px rgba(20,24,33,0.30);
}
.org-logo img { width: 100%; height: 100%; object-fit: contain; padding: 8px; }
.org-initials {
    display: grid; place-items: center; width: 100%; height: 100%;
    background: var(--accent); color: var(--on-accent);
    font-family: var(--font-display); font-weight: 600; font-size: 1.15rem; letter-spacing: -0.02em;
}

/* ---------- Experience timeline ---------- */
.timeline { display: flex; flex-direction: column; }
.exp-meta { display: flex; flex-direction: column; gap: 16px; }
.exp-item {
    display: grid; grid-template-columns: 220px 1fr; gap: 40px;
    padding: 34px 0; border-top: 1px solid var(--line); position: relative;
}
.exp-item:first-child { border-top: 0; }
.exp-period { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent); letter-spacing: 0.04em; padding-top: 4px; }
.exp-loc { display: block; color: var(--muted-2); margin-top: 6px; letter-spacing: 0.06em; }
.exp-role { font-family: var(--font-display); font-weight: 500; font-size: 1.4rem; letter-spacing: -0.01em; }
.exp-company { color: var(--accent); font-size: 0.95rem; margin: 4px 0 16px; font-weight: 400; }
.exp-bullets li { color: var(--muted); font-size: 0.98rem; line-height: 1.7; padding-left: 24px; position: relative; margin-bottom: 9px; }
.exp-bullets li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-family: var(--font-mono); }

/* ---------- Projects ---------- */
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.project-card {
    border: 1px solid var(--line); border-radius: 18px; padding: 0;
    background: linear-gradient(180deg, var(--ink-2), rgba(15, 20, 30, 0.3));
    display: flex; flex-direction: column;
    transition: all 0.4s var(--ease); position: relative; overflow: hidden;
}
.project-card:hover { border-color: var(--line-2); transform: translateY(-5px); box-shadow: 0 22px 50px -28px rgba(20,24,33,0.22); }

.project-media { position: relative; aspect-ratio: 16 / 9; overflow: hidden; border-bottom: 1px solid var(--line); }
.project-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s var(--ease); }
.project-card:hover .project-media img { transform: scale(1.05); }
.project-media::after {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background: linear-gradient(180deg, rgba(11,14,20,0.10) 0%, transparent 35%, rgba(11,14,20,0.55) 100%);
}
.project-chip {
    position: absolute; top: 14px; left: 14px; z-index: 2;
    width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
    background: rgba(11,14,20,0.55); backdrop-filter: blur(8px);
    border: 1px solid var(--line-2); color: var(--accent); font-size: 1rem;
}
.project-card .project-media .project-date {
    position: absolute; top: 18px; right: 16px; z-index: 2; padding-top: 0;
    background: rgba(11,14,20,0.55); backdrop-filter: blur(8px);
    border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px;
}
.project-content { padding: 26px 28px 30px; display: flex; flex-direction: column; gap: 14px; flex-grow: 1; }
.project-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; position: relative; }
.project-date { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted-2); letter-spacing: 0.08em; white-space: nowrap; padding-top: 6px; }
.project-icon { color: var(--accent); font-size: 1.2rem; }
.project-title { font-family: var(--font-display); font-weight: 500; font-size: 1.4rem; line-height: 1.2; letter-spacing: -0.01em; position: relative; }
.project-desc { color: var(--muted); font-size: 0.95rem; line-height: 1.7; position: relative; flex-grow: 1; }
.project-tags { display: flex; flex-wrap: wrap; gap: 8px; position: relative; }
.tag {
    font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.03em;
    color: var(--muted); border: 1px solid var(--line); border-radius: 999px;
    padding: 5px 11px; transition: all 0.3s var(--ease);
}
.project-card:hover .tag { border-color: var(--line-2); }
.project-links { display: flex; gap: 18px; position: relative; margin-top: 2px; }
.project-link { font-family: var(--font-mono); font-size: 0.74rem; color: var(--accent); display: inline-flex; gap: 7px; align-items: center; letter-spacing: 0.04em; transition: gap 0.3s var(--ease); }
.project-link:hover { gap: 11px; }

/* ---------- Skills ---------- */
.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.skill-group {
    border: 1px solid var(--line); border-radius: 16px; padding: 26px 28px;
    background: linear-gradient(180deg, var(--ink-2), transparent);
}
.skill-group-head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.skill-group-head i { color: var(--accent); font-size: 1rem; }
.skill-group-name { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ivory); }
.skill-pills { display: flex; flex-wrap: wrap; gap: 9px; }
.pill {
    font-size: 0.85rem; color: var(--muted); border: 1px solid var(--line);
    border-radius: 9px; padding: 7px 13px; transition: all 0.28s var(--ease); cursor: default;
}
.pill:hover { color: var(--on-accent); background: var(--accent); border-color: var(--accent); transform: translateY(-2px); }

/* ---------- Education + Certs ---------- */
.education-list { display: flex; flex-direction: column; gap: 18px; margin-bottom: 64px; }
.edu-item {
    display: grid; grid-template-columns: auto 1fr auto; gap: 22px; align-items: start;
    border: 1px solid var(--line); border-radius: 16px; padding: 28px 30px;
    background: linear-gradient(180deg, var(--ink-2), transparent);
    transition: border-color 0.35s var(--ease);
}
.edu-item:hover { border-color: var(--line-2); }
.edu-degree { font-family: var(--font-display); font-weight: 500; font-size: 1.3rem; }
.edu-school { color: var(--accent); font-size: 0.98rem; margin: 5px 0 12px; }
.edu-course { color: var(--muted); font-size: 0.9rem; }
.edu-course span { color: var(--muted-2); font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; display: block; margin-bottom: 4px; }
.edu-side { text-align: right; }
.edu-gpa { font-family: var(--font-display); font-size: 1.5rem; font-weight: 500; color: var(--ivory); }
.edu-period { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted-2); letter-spacing: 0.06em; margin-top: 6px; }
.edu-loc { display: block; color: var(--muted-2); font-size: 0.8rem; margin-top: 2px; }

.certs-title { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin-bottom: 22px; }
.certs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.cert-item { border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; transition: all 0.3s var(--ease); }
.cert-item:hover { border-color: var(--line-2); transform: translateY(-3px); }
.cert-name { font-size: 0.92rem; color: var(--ivory); }
.cert-issuer { font-family: var(--font-mono); font-size: 0.7rem; color: var(--accent); letter-spacing: 0.04em; margin-top: 4px; }

/* ---------- Publications ---------- */
.pub-list { counter-reset: pub; display: flex; flex-direction: column; gap: 4px; }
.pub-item {
    counter-increment: pub; display: grid; grid-template-columns: 56px 1fr auto; gap: 22px;
    padding: 26px 0; border-top: 1px solid var(--line); align-items: baseline;
    transition: padding-left 0.35s var(--ease);
}
.pub-item:hover { padding-left: 10px; }
.pub-item::before { content: "[" counter(pub) "]"; font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); }
.pub-body .pub-title { font-family: var(--font-display); font-weight: 500; font-size: 1.2rem; line-height: 1.3; }
.pub-venue { font-family: var(--font-mono); font-size: 0.74rem; color: var(--gold); letter-spacing: 0.04em; margin: 7px 0; }
.pub-desc { color: var(--muted); font-size: 0.95rem; line-height: 1.65; }
.pub-link { font-family: var(--font-mono); font-size: 0.74rem; color: var(--accent); display: inline-flex; gap: 7px; align-items: center; margin-top: 8px; }
.pub-year { font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted-2); white-space: nowrap; }

/* ---------- Contact ---------- */
.contact-wrap { max-width: 760px; }
.contact-lede { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.4rem, 3.4vw, 2.2rem); line-height: 1.35; color: var(--ivory); margin-bottom: 30px; }
.contact-mail {
    font-family: var(--font-display); font-style: italic; font-weight: 500;
    font-size: clamp(1.6rem, 5vw, 3rem); color: var(--accent);
    display: inline-block; position: relative; letter-spacing: -0.01em;
    transition: color 0.3s var(--ease); word-break: break-word;
}
.contact-mail::after { content: ""; position: absolute; left: 0; bottom: 4px; width: 100%; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.4s var(--ease); }
.contact-mail:hover::after { transform: scaleX(1); }
.contact-links { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 46px; }
.contact-link {
    font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.03em;
    border: 1px solid var(--line); border-radius: 11px; padding: 13px 20px;
    display: inline-flex; align-items: center; gap: 11px; color: var(--muted);
    transition: all 0.3s var(--ease);
}
.contact-link i { color: var(--accent); }
.contact-link:hover { color: var(--ivory); border-color: var(--accent); transform: translateY(-3px); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 50px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-text { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); letter-spacing: 0.04em; }
.footer-social { display: flex; gap: 12px; }
.footer-copyright { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted-2); letter-spacing: 0.04em; }

/* ---------- Back to top ---------- */
.back-to-top {
    position: fixed; bottom: 28px; right: 28px; z-index: 90;
    width: 46px; height: 46px; border-radius: 12px; cursor: pointer;
    background: var(--accent); color: var(--on-accent); border: 0;
    display: grid; place-items: center;
    opacity: 0; pointer-events: none; transform: translateY(14px);
    transition: all 0.4s var(--ease); box-shadow: 0 14px 40px -14px var(--accent);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); }

/* ---------- Reveal animation (gated on .js so content is visible if JS fails) ---------- */
.reveal { transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.js .reveal { opacity: 0; transform: translateY(28px); }
.js .reveal.in { opacity: 1; transform: translateY(0); }

/* hero staggered load */
.hero-meta, .hero-main > *, .hero-stats { opacity: 0; animation: heroUp 0.9s var(--ease) forwards; }
.hero-meta { animation-delay: 0.05s; }
.hero-main .eyebrow { animation-delay: 0.15s; }
.hero-name { animation-delay: 0.25s; }
.hero-role { animation-delay: 0.38s; }
.hero-summary { animation-delay: 0.5s; }
.hero-cta { animation-delay: 0.62s; }
.hero-social { animation-delay: 0.72s; }
.hero-stats { animation-delay: 0.85s; }
@keyframes heroUp { from { opacity: 0; transform: translateY(26px); } to { opacity: 1; transform: translateY(0); } }

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
    .reveal { opacity: 1; transform: none; }
    .hero-meta, .hero-main > *, .hero-stats { opacity: 1; }
}

/* ---------- Custom scrollbar ---------- */
::-webkit-scrollbar { width: 11px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: #232b3a; border-radius: 6px; border: 3px solid var(--ink); }
::-webkit-scrollbar-thumb:hover { background: var(--accent-d); }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
    .hero-top { grid-template-columns: 1fr; gap: 44px; }
    .hero-portrait { justify-content: flex-start; order: -1; }
    .hero-portrait-frame { max-width: 240px; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .projects-grid, .skills-grid { grid-template-columns: 1fr; }
    .certs-grid { grid-template-columns: repeat(2, 1fr); }
    .exp-item { grid-template-columns: 1fr; gap: 14px; }
    .exp-period { padding-top: 0; }
}
@media (max-width: 720px) {
    .nav-menu {
        position: fixed; inset: 0 0 0 auto; width: min(78vw, 320px);
        background: var(--ink-2); flex-direction: column; align-items: flex-start;
        padding: 100px 32px; gap: 26px; transform: translateX(100%);
        transition: transform 0.45s var(--ease); border-left: 1px solid var(--line);
    }
    .nav-menu.active { transform: translateX(0); }
    .nav-link { font-size: 1rem; }
    .nav-toggle { display: block; z-index: 101; }
    .nav-brand-name { display: none; }
    .hero { padding-top: 120px; }
    .hero-stats { grid-template-columns: 1fr; gap: 24px; }
    .pub-item { grid-template-columns: 1fr; gap: 6px; }
    .pub-item::before { display: none; }
    .edu-item { grid-template-columns: 1fr; }
    .edu-side { text-align: left; }
    .certs-grid { grid-template-columns: 1fr; }
    .section { padding: 80px 0; }
    .container { padding: 0 20px; }
}