*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#fafafa;
  --surface:#ffffff;
  --surface2:#f4f4f5;
  --ink:#18181b;
  --ink2:#52525b;
  --ink3:#a1a1aa;
  --primary:#2563eb;
  --primary-light:#eff4ff;
  --primary-mid:#bfdbfe;
  --accent:#3f3f46;
  --success:#2d6a4f;
  --success-light:#e8f3ee;
  --border:#e4e4e7;
  --on-ink:#ffffff;
  --display:'Archivo',ui-sans-serif,sans-serif;
  --mono:'DM Mono',ui-monospace,'SF Mono',monospace;
  --sans:'Space Grotesk',system-ui,sans-serif;
}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.6;font-size:16px}
.skip-link{position:absolute;top:-40px;left:0;background:var(--ink);color:var(--on-ink);padding:8px 16px;z-index:1000;transition:top 0.2s;font-family:var(--mono);font-size:0.8rem;text-decoration:none}
.skip-link:focus{top:0}
*:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

/* NAV */
nav{background:rgba(255,255,255,0.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);padding:0 2rem;position:sticky;top:0;z-index:100}
.nav-inner{max-width:1080px;margin:0 auto;display:flex;justify-content:flex-start;align-items:center;height:56px}
.logo{font-family:var(--display);font-size:20px;letter-spacing:-0.01em;font-style:normal;font-weight:600;color:var(--ink);text-decoration:none}
.nav-tools{display:flex;align-items:center;gap:10px;width:100%}
.mobile-nav-toggle{display:none;background:transparent;border:none;color:var(--ink);font-size:1.5rem;cursor:pointer;padding:0 5px;line-height:1}
.nav-pills{display:flex;gap:4px}
.nav-pill{padding:6px 14px;min-height:44px;display:inline-flex;align-items:center;border-radius:100px;font-size:0.78rem;font-family:var(--mono);color:var(--ink2);text-decoration:none;transition:background 0.15s}
.nav-pill:hover,.nav-pill:focus-visible{background:var(--surface2);outline:none}
.lang-switch{display:inline-flex;padding:3px;border:1px solid var(--border);border-radius:999px;background:var(--surface);margin-left:auto}
.lang-btn{border:none;background:transparent;color:var(--ink3);padding:8px 12px;min-height:36px;border-radius:999px;font-family:var(--mono);font-size:0.68rem;letter-spacing:0.08em;text-transform:uppercase;cursor:pointer;transition:all 0.15s}
.lang-btn.active{background:var(--ink);color:var(--on-ink)}

/* HERO */
.hero{max-width:1080px;margin:0 auto;padding:5rem 2rem 4rem;border-bottom:1px solid var(--border)}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;margin-bottom:2rem;padding:5px 14px;border-radius:100px;border:1px solid var(--border);background:var(--surface)}
.kicker-dot{width:7px;height:7px;border-radius:50%;background:var(--success);animation:blink 1.8s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0.3}}
.kicker-status{font-family:var(--mono);font-size:0.72rem;color:var(--success);font-weight:500}
.kicker-divider{color:var(--ink3);font-size:0.72rem}
.kicker-tag{font-family:var(--mono);font-size:0.72rem;color:var(--ink2);letter-spacing:0.06em}
.hero-name{font-family:var(--display);font-size:clamp(3rem,6vw,5.5rem);line-height:1;letter-spacing:-0.01em;font-weight:400;margin-bottom:1.25rem}
.hero-name em{font-style:italic;color:var(--primary)}
.hero-role{font-family:var(--mono);font-size:0.9rem;color:var(--primary);margin-bottom:1.5rem;letter-spacing:0.02em;font-weight:500}
.hero-desc{font-size:0.9rem;color:var(--ink2);max-width:580px;line-height:1.7;margin-bottom:2.5rem}
.hero-desc strong{color:var(--ink);font-weight:600}
.hero-ctas{display:flex;gap:0.65rem;flex-wrap:wrap;margin-bottom:3.5rem}
.cta{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;min-height:44px;border-radius:8px;font-family:var(--mono);font-size:0.78rem;text-decoration:none;transition:all 0.15s;letter-spacing:0.03em;cursor:pointer;border:1px solid transparent}
.cta-primary{background:var(--ink);color:var(--on-ink);border-color:var(--ink)}
.cta-primary:hover{background:var(--ink2);border-color:var(--ink2)}
.cta-secondary{background:transparent;border-color:var(--border);color:var(--ink2)}
.cta-secondary:hover,.cta-secondary:focus-visible{border-color:var(--ink);color:var(--ink);outline:none}
.hero-strengths{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1px;background:var(--border);border:1px solid var(--border);border-radius:12px;overflow:hidden}@media (max-width:768px){.hero-strengths{grid-template-columns:repeat(2,1fr)}}@media (max-width:480px){.hero-strengths{grid-template-columns:1fr}}
.strength{padding:1.25rem 1.4rem;background:var(--surface)}
.strength-label{font-family:var(--mono);font-size:0.68rem;letter-spacing:0.12em;text-transform:uppercase;margin-bottom:0.4rem;font-weight:500;color:var(--primary)}
.strength-desc{font-size:0.82rem;color:var(--ink2);line-height:1.55}

.info-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:1rem 1.1rem}
.plan-label{font-family:var(--mono);font-size:0.68rem;letter-spacing:0.12em;text-transform:uppercase;color:var(--primary);margin-bottom:0.3rem}
.plan-value{font-family:var(--display);font-size:1.45rem;line-height:1.05;font-weight:400;color:var(--ink)}
.plan-desc{font-size:0.8rem;color:var(--ink2);line-height:1.55;margin-top:0.35rem}

/* SECTION */
.section{max-width:1080px;margin:0 auto;padding:4.5rem 2rem;border-bottom:1px solid var(--border)}
.section-eyebrow{font-family:var(--mono);font-size:0.7rem;letter-spacing:0.14em;text-transform:uppercase;color:var(--ink2);margin-bottom:0.6rem;font-weight:500}
.section-title{font-family:var(--display);font-size:clamp(1.8rem,3vw,2.6rem);line-height:1.1;font-weight:400;margin-bottom:0.5rem;color:var(--ink)}
.section-subtitle{font-size:0.95rem;color:var(--ink2);margin-bottom:3rem;max-width:640px;line-height:1.65}

/* EXPERIENCE */
.exp-list{display:flex;flex-direction:column}
.exp-item{display:grid;grid-template-columns:180px 1fr;gap:2rem;padding:1.75rem 0;border-bottom:1px solid var(--border)}
.exp-item:last-child{border-bottom:none}
.exp-meta{font-family:var(--mono);font-size:0.74rem;color:var(--ink3);line-height:1.6}
.exp-meta-date{color:var(--ink);font-weight:500;margin-bottom:0.35rem;display:block}
.exp-meta-loc{font-size:0.7rem}
.exp-role{font-size:1.1rem;font-weight:600;color:var(--ink);margin-bottom:0.25rem;line-height:1.35}
.exp-company{font-size:0.88rem;color:var(--primary);margin-bottom:0.9rem;font-weight:500}
.exp-bullets{list-style:none;padding:0;margin:0}
.exp-bullets li{font-size:0.88rem;color:var(--ink2);line-height:1.65;padding-left:1.1rem;position:relative;margin-bottom:0.5rem}
.exp-bullets li::before{content:'';position:absolute;left:0;top:0.65rem;width:4px;height:4px;border-radius:50%;background:var(--primary)}
.exp-bullets li strong{color:var(--ink);font-weight:600}
.exp-impact{display:inline-block;background:var(--success-light);color:var(--success);font-family:var(--mono);font-size:0.74rem;padding:4px 10px;border-radius:4px;margin-top:0.6rem;font-weight:500}

/* PROJECTS */
.projects-sublabel{font-family:var(--mono);font-size:0.68rem;letter-spacing:0.14em;text-transform:uppercase;color:var(--ink3);margin-bottom:0.75rem;font-weight:500;border-top:1px solid var(--border);padding-top:1rem}

.project-preview{height:138px;border-radius:10px;border:1px solid var(--border);background:var(--surface2);position:relative;overflow:hidden;padding:1rem}
.project-preview span{position:relative;z-index:2;display:inline-flex;background:rgba(255,255,255,0.9);border:1px solid var(--border);border-radius:999px;padding:0.28rem 0.58rem;font-family:var(--mono);font-size:0.65rem;color:var(--ink)}
.preview-router{background:linear-gradient(135deg,#eaf2fb,#fff 45%,#f3eadf)}
.route-line{position:absolute;left:24px;right:24px;height:12px;border-radius:999px;background:var(--primary-mid)}
.route-a{top:56px;width:72%}.route-b{top:82px;width:55%;background:#d7b48c}.route-c{top:108px;width:38%;background:#9ab7a4}
.preview-quality{background:linear-gradient(135deg,#e8f3ee,#fff)}
.quality-bars{position:absolute;left:22px;right:22px;bottom:22px;display:grid;grid-template-columns:repeat(4,1fr);gap:10px;align-items:end}
.quality-bars i{display:block;border-radius:8px 8px 0 0;background:var(--success)}
.quality-bars i:nth-child(1){height:38px}.quality-bars i:nth-child(2){height:72px}.quality-bars i:nth-child(3){height:54px}.quality-bars i:nth-child(4){height:92px}
.preview-cinema{background:linear-gradient(135deg,#f5ebe5,#fff)}
.cinema-grid{position:absolute;left:22px;right:22px;bottom:22px;display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.cinema-grid i{height:26px;border-radius:6px;background:var(--accent);opacity:0.86}
.cinema-grid i:nth-child(2),.cinema-grid i:nth-child(5){background:var(--primary)}
.preview-mlops{background:linear-gradient(135deg,#edf0f4,#fff)}
.monitor-card{position:absolute;left:22px;right:22px;bottom:42px;height:48px;border-radius:8px;border:1px solid var(--primary-mid);background:rgba(255,255,255,0.82)}
.monitor-line{position:absolute;left:38px;right:38px;bottom:64px;height:3px;background:linear-gradient(90deg,var(--success) 35%,var(--accent) 35% 58%,var(--primary) 58%);border-radius:999px}

.roadmap-panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden}
.roadmap-toggle{list-style:none;padding:1rem 1.2rem;font-family:var(--mono);font-size:0.76rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--ink);cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.roadmap-toggle::-webkit-details-marker{display:none}
.roadmap-toggle::after{content:'+';font-size:1rem;line-height:1;color:var(--ink2)}
.roadmap-panel[open] .roadmap-toggle{border-bottom:1px solid var(--border)}
.roadmap-panel[open] .roadmap-toggle::after{content:'−'}
.roadmap-panel-body{padding:1.2rem}
.roadmap-panel-copy{font-size:0.88rem;color:var(--ink2);line-height:1.7;max-width:700px;margin-bottom:1.5rem}
.project-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin:0 0 2rem}
.summary-card strong{display:block;color:var(--ink);margin-bottom:0.25rem}
.summary-card span{font-size:0.84rem;color:var(--ink2);line-height:1.6}
.proj-card-group{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:1.5rem;color:inherit}
.project-stage+.project-stage{margin-top:2.25rem;padding-top:2.25rem;border-top:1px solid var(--border)}
.stage-head{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;flex-wrap:wrap;margin-bottom:0;cursor:pointer;list-style:none;transition:margin 0.2s}
.project-stage[open] .stage-head{margin-bottom:1.2rem}
.stage-head::-webkit-details-marker{display:none}
.stage-head:hover .stage-title{color:var(--primary)}
.stage-head-right{display:flex;align-items:center;gap:0.75rem}
.stage-toggle-icon{font-size:1.2rem;line-height:1;color:var(--ink2);transition:transform 0.2s}
.project-stage[open] .stage-toggle-icon{transform:rotate(45deg)}
.stage-kicker{font-family:var(--mono);font-size:0.68rem;letter-spacing:0.14em;text-transform:uppercase;color:var(--ink2);margin-bottom:0.35rem}
.stage-title{font-family:var(--display);font-size:1.65rem;line-height:1.15;font-weight:400;color:var(--ink);margin-bottom:0.35rem}
.stage-desc{max-width:620px;font-size:0.9rem;color:var(--ink2);line-height:1.7}
.stage-note{font-family:var(--mono);font-size:0.72rem;color:var(--ink3);background:var(--surface2);border-radius:999px;padding:0.45rem 0.8rem;white-space:nowrap}
.roadmap-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem}
.roadmap-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.15rem;display:flex;flex-direction:column;gap:0.7rem;min-height:100%}
.roadmap-card.is-live{border-color:var(--primary-mid);box-shadow:0 10px 28px rgba(37,99,235,0.08)}
.roadmap-top{display:flex;justify-content:space-between;align-items:center;gap:0.75rem;flex-wrap:wrap}
.roadmap-day{font-family:var(--mono);font-size:0.68rem;letter-spacing:0.12em;text-transform:uppercase;color:var(--primary)}
.roadmap-status{font-family:var(--mono);font-size:0.64rem;letter-spacing:0.08em;text-transform:uppercase;border-radius:999px;padding:0.28rem 0.55rem;border:1px solid var(--border);color:var(--ink2);background:var(--surface2)}
.roadmap-status.is-live{color:var(--success);background:var(--success-light);border-color:rgba(45,106,79,0.18)}
.roadmap-name{font-size:1rem;line-height:1.35;color:var(--ink);font-weight:600}
.roadmap-hook{font-size:0.86rem;line-height:1.65;color:var(--ink2)}
.roadmap-hook strong{color:var(--ink);font-weight:600}
.roadmap-tags{display:flex;flex-wrap:wrap;gap:0.35rem}
.proj-tags{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:0.75rem}
.proj-tag{font-size:0.66rem;font-family:var(--mono);padding:3px 8px;border-radius:4px;background:var(--surface2);color:var(--ink2);border:1px solid var(--border)}
.roadmap-card:has(.is-disabled){opacity:0.65;border-style:dashed}
.roadmap-link{margin-top:auto;display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0.7rem 0.9rem;border-radius:8px;border:1px solid var(--ink);background:var(--ink);color:var(--on-ink);text-decoration:none;font-family:var(--mono);font-size:0.72rem;letter-spacing:0.04em}
.roadmap-link.is-disabled{background:transparent;border-color:var(--border);color:var(--ink3);cursor:default}
.roadmap-meta{font-family:var(--mono);font-size:0.67rem;color:var(--ink3);letter-spacing:0.04em;margin-top:-0.2rem}
/* ACHIEVEMENTS */
.achieve-list{display:flex;flex-direction:column;gap:1rem;margin-top:1.5rem}
.achieve-item{display:flex;gap:1.25rem;align-items:flex-start;padding:1.1rem 1.25rem;background:var(--surface);border:1px solid var(--border);border-radius:12px}
.achieve-year{font-family:var(--mono);font-size:0.75rem;color:var(--primary);font-weight:600;min-width:36px;padding-top:3px;letter-spacing:0.04em}
.achieve-body{flex:1}
.achieve-title{font-size:0.96rem;font-weight:600;color:var(--ink);margin-bottom:0.18rem;line-height:1.3}
.achieve-org{font-family:var(--mono);font-size:0.67rem;color:var(--ink3);text-transform:uppercase;letter-spacing:0.07em;margin-bottom:0.45rem}
.achieve-desc{font-size:0.85rem;color:var(--ink2);line-height:1.65}

/* FEATURED LIVE CASES */
.featured-carousel{margin-bottom:2rem}
.featured-carousel-controls{display:none;justify-content:flex-end;gap:0.4rem;margin-bottom:0.75rem}
.featured-carousel-controls.is-visible{display:flex}
.carousel-btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--border);background:var(--surface);color:var(--ink2);font-size:1.1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all 0.15s;line-height:1}
.carousel-btn:hover:not(:disabled){background:var(--ink);color:#fff;border-color:var(--ink)}
.carousel-btn:disabled{opacity:0.28;cursor:default}
.featured-track-wrap{overflow:hidden}
.featured-grid{display:flex;flex-wrap:nowrap;gap:1rem;transition:transform 0.4s cubic-bezier(.25,.46,.45,.94)}
.featured-card{flex:0 0 auto;min-width:0;background:var(--surface);border:1px solid var(--primary-mid);border-radius:12px;padding:1.4rem;display:flex;flex-direction:column;gap:0;box-shadow:0 8px 24px rgba(37,99,235,0.07)}
.featured-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}
.featured-label{font-family:var(--mono);font-size:0.64rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--primary)}
.featured-live{font-family:var(--mono);font-size:0.62rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--success);background:var(--success-light);border:1px solid rgba(45,106,79,0.18);border-radius:999px;padding:0.22rem 0.55rem}
.featured-name{font-family:var(--display);font-size:1.25rem;line-height:1.2;font-weight:400;color:var(--ink);margin-bottom:0.5rem}
.featured-hook{font-size:0.86rem;color:var(--ink2);line-height:1.65;margin-bottom:1rem;flex-grow:1}
.featured-hook strong{color:var(--ink);font-weight:600}
.featured-stats{display:flex;gap:0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin-bottom:1rem}
.featured-stat{flex:1;padding:0.7rem 0.6rem;display:flex;flex-direction:column;gap:0.2rem;border-right:1px solid var(--border)}
.featured-stat:last-child{border-right:none}
.featured-stat-num{font-family:var(--mono);font-size:0.9rem;color:var(--ink);font-weight:500;line-height:1}
.featured-stat-label{font-family:var(--mono);font-size:0.58rem;color:var(--ink3);text-transform:uppercase;letter-spacing:0.07em}
.featured-tags{display:flex;flex-wrap:wrap;gap:0.35rem;margin-bottom:1rem}
.featured-cta{display:flex;align-items:center;justify-content:center;padding:0.65rem;border-radius:8px;border:1px solid var(--ink);background:var(--ink);color:var(--on-ink);text-decoration:none;font-family:var(--mono);font-size:0.72rem;letter-spacing:0.04em;transition:all 0.15s;margin-top:auto}
.featured-cta:hover{background:var(--primary);border-color:var(--primary)}

/* EDUCATION */
.edu-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.edu-block{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:1.5rem}
.edu-block-title{font-family:var(--mono);font-size:0.72rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--primary);margin-bottom:1.1rem;font-weight:500}
.edu-item{padding:0.85rem 0;border-bottom:1px solid var(--border)}
.edu-item:last-child{border-bottom:none;padding-bottom:0}
.edu-item:first-child{padding-top:0}
.edu-title{font-size:0.92rem;font-weight:600;color:var(--ink);line-height:1.4;margin-bottom:0.25rem}
.edu-sub{font-size:0.82rem;color:var(--ink2);line-height:1.5;margin-bottom:0.2rem}
.edu-meta{font-family:var(--mono);font-size:0.7rem;color:var(--ink3)}
.edu-meta strong{color:var(--ink2)}

/* ABOUT */
.about-grid{display:grid;grid-template-columns:1fr;gap:2rem}
.about-text{font-size:0.95rem;color:var(--ink2);line-height:1.7}
.about-text p+p{margin-top:1rem}
.about-text strong{color:var(--ink);font-weight:600}
.skills-block{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:1.5rem}
.skills-block-title{font-family:var(--mono);font-size:0.72rem;letter-spacing:0.1em;text-transform:uppercase;margin-bottom:1rem;font-weight:500;color:var(--primary)}
.skills-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--border);width:100%}
.skills-col{padding:1.25rem 1.4rem;border-right:1px solid var(--border);min-width:0}
.skills-col:last-child{border-right:none}
.skills-col-header{font-family:var(--mono);font-size:0.68rem;letter-spacing:0.12em;text-transform:uppercase;color:var(--primary);font-weight:700;margin-bottom:0.85rem}
.skill-row{font-size:0.84rem;color:var(--ink2);line-height:1.65;margin-bottom:0.75rem}
.skill-row:last-child{margin-bottom:0}
.skill-row strong{color:var(--ink);font-weight:600;display:block;margin-bottom:0.15rem;font-size:0.82rem}

/* CONTACT */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.contact-headline{font-family:var(--display);font-size:clamp(1.6rem,3vw,2.4rem);line-height:1.2;font-weight:400;color:var(--ink)}
.contact-headline em{font-style:italic;color:var(--primary)}
.contact-items{display:flex;flex-direction:column;gap:0.65rem}
.contact-item{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink2);font-size:0.88rem;font-family:var(--mono);transition:color 0.15s;padding:12px 0;min-height:44px}
.contact-item[href]:hover,.contact-item[href]:focus-visible{color:var(--ink);outline:none}
.contact-icon{width:30px;height:30px;border-radius:6px;background:var(--surface2);display:flex;align-items:center;justify-content:center;font-size:0.85rem;flex-shrink:0}
.contact-note{font-size:0.88rem;color:var(--ink2);line-height:1.65;margin-top:1.25rem;max-width:380px}

/* FOOTER */
footer{text-align:center;padding:2rem;font-family:var(--mono);font-size:0.72rem;color:var(--ink3);border-top:1px solid var(--border)}
footer a{color:var(--ink2);text-decoration:none}
footer a:hover{color:var(--ink)}

@media(max-width:620px){
  .skills-columns{grid-template-columns:1fr}
  .skills-col{border-right:none;border-bottom:1px solid var(--border);padding:1rem}
  .skills-col:last-child{border-bottom:none}
}
@media(max-width:760px){
  .project-summary{grid-template-columns:1fr}
  .hero-strengths,.about-grid,.contact-wrap,.edu-grid{grid-template-columns:1fr}
  .exp-item{grid-template-columns:1fr;gap:0.75rem}
  .nav-tools{width:100%;justify-content:space-between}
  .mobile-nav-toggle{display:block}
  .nav-pills{display:none;position:absolute;top:56px;left:0;width:100%;background:rgba(255,255,255,0.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);flex-direction:column;padding:1rem 2rem;gap:0.5rem;box-shadow:0 4px 12px rgba(0,0,0,0.05)}
  nav.nav-open .nav-pills{display:flex}
  .hero{padding:3.5rem 1.5rem 3rem}
  .section{padding:3.5rem 1.5rem}
  body{font-size:15px}
}

/* ── Dark Mode — toggled via data-theme="dark" on <html> ── */
html[data-theme="dark"]{
  --bg:#18181b;
  --surface:#27272a;
  --surface2:#3f3f46;
  --ink:#fafafa;
  --ink2:#a1a1aa;
  --ink3:#71717a;
  --primary:#60a5fa;
  --primary-light:rgba(96,165,250,0.12);
  --primary-mid:rgba(96,165,250,0.32);
  --accent:#a1a1aa;
  --success:#30d158;
  --success-light:rgba(48,209,88,0.15);
  --border:rgba(255,255,255,0.12);
  --on-ink:#18181b;
}
html[data-theme="dark"] nav{background:rgba(24,24,27,0.92)}
html[data-theme="dark"] .nav-pills{background:rgba(24,24,27,0.96)}
html[data-theme="dark"] .proj-card-group{background:var(--surface)}
html[data-theme="dark"] .roadmap-card{background:var(--surface)}
html[data-theme="dark"] .edu-block{background:var(--surface)}
html[data-theme="dark"] .skills-block{background:var(--surface)}
html[data-theme="dark"] .featured-card{background:var(--surface)}

/* ── Theme toggle button ── */
.theme-toggle{width:44px;height:44px;border-radius:50%;border:1px solid var(--border);background:var(--surface2);color:var(--ink);cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:all 0.15s;flex-shrink:0;line-height:1}

/* ── Scroll reveal — progressive enhancement, activated only once JS confirms observer support ── */
.js-reveal .reveal{opacity:0;transform:translateY(18px);transition:opacity 0.6s cubic-bezier(.22,.61,.36,1),transform 0.6s cubic-bezier(.22,.61,.36,1)}
.js-reveal .reveal.is-visible{opacity:1;transform:none}
.js-reveal .reveal:nth-child(2){transition-delay:60ms}
.js-reveal .reveal:nth-child(3){transition-delay:120ms}
.js-reveal .reveal:nth-child(4){transition-delay:180ms}
.js-reveal .reveal:nth-child(5){transition-delay:240ms}
.js-reveal .reveal:nth-child(6){transition-delay:300ms}
.js-reveal .reveal:nth-child(7){transition-delay:360ms}
.js-reveal .reveal:nth-child(8){transition-delay:420ms}

/* ── Reduced Motion — accessibility ── */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:0.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:0.01ms!important;
    scroll-behavior:auto!important;
  }
  html{scroll-behavior:auto}
  .kicker-dot{animation:none;opacity:1}
  .featured-grid{transition:none}
  .js-reveal .reveal{transform:none}
}