/* Zarif Karim — portfolio v2 (home page) */
:root {
  --bg: #080d1a; --bg2: #0b1224; --card: #101a30; --card2: #162342;
  --line: #1e3a5f; --cyan: #00d4ff; --purple: #8b5cf6; --green: #10b981; --orange: #ff8a3d;
  --tx: #e2e8f0; --tx2: #c8d5e1; --mute: #94a3b8;
  --mono: 'JetBrains Mono', 'Fira Code', Menlo, monospace;
  --sans: 'Poppins', system-ui, sans-serif;
  --r: 16px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--tx); font-family: var(--sans); font-weight: 300; line-height: 1.65; overflow-x: hidden; }
a { color: var(--cyan); text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }
::selection { background: rgba(0,212,255,.25); }

body::before { /* faint circuit grid */
  content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image: linear-gradient(rgba(0,212,255,.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0,212,255,.03) 1px, transparent 1px);
  background-size: 50px 50px;
}
#spot { position: fixed; inset: 0; pointer-events: none; z-index: 1;
  background: radial-gradient(520px circle at var(--sx, 50%) var(--sy, 30%), rgba(0,212,255,.07), transparent 60%); }
#progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 200;
  background: linear-gradient(90deg, var(--cyan), var(--purple)); box-shadow: 0 0 12px var(--cyan); }

/* header */
#top { position: fixed; top: 0; left: 0; right: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between;
  padding: 12px clamp(16px, 4vw, 48px); transition: background .3s, backdrop-filter .3s, border-color .3s; border-bottom: 1px solid transparent; }
#top.solid { background: rgba(8,13,26,.92); backdrop-filter: blur(14px); border-color: rgba(30,58,95,.7); }
.logo { display: flex; align-items: center; gap: 10px; color: var(--tx); font-weight: 600; }
.logo-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; font: 600 13px var(--mono);
  color: var(--bg); background: linear-gradient(135deg, var(--cyan), var(--purple)); }
#nav { display: flex; gap: 4px; }
#nav a { color: var(--tx2); font-size: 14px; padding: 6px 12px; border-radius: 999px; transition: .2s; }
#nav a:hover, #nav a.on { color: var(--cyan); background: rgba(0,212,255,.08); }
#menu { display: none; background: none; border: 0; font-size: 28px; }

/* hero: full-page photo */
#hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden;
  background: url('../img/hero.jpg') center 28% / cover no-repeat; }
#hero::before { content: ''; position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(135deg, rgba(8,13,26,.78) 0%, rgba(8,13,26,.58) 60%, rgba(8,13,26,.72) 100%); }
#hero::after { content: ''; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(700px circle at 40% 50%, rgba(0,212,255,.07), transparent 70%), linear-gradient(0deg, var(--bg), transparent 16%); }
.hero-content { position: relative; z-index: 2; width: min(1180px, 100% - 32px); margin: 0 auto; padding: 100px 0 70px; }
.mono-tag { font: 400 13px var(--mono); color: var(--cyan); letter-spacing: .5px; }
.role { font: 400 13px var(--mono); letter-spacing: 3px; text-transform: uppercase; color: var(--mute); margin: 0 0 38px; }
.list-social { display: flex; gap: 14px; margin: 0; padding: 0; list-style: none; }
.list-social a { display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px; color: var(--tx2); font-size: 18px; background: rgba(8,13,26,.35); backdrop-filter: blur(6px); transition: .25s; }
.list-social a:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-3px); box-shadow: 0 0 20px rgba(0,212,255,.2); }
.feat-text h2 { font-size: clamp(1.8rem, 3.6vw, 2.8rem); font-weight: 700; line-height: 1.15; margin: 12px 0 12px; letter-spacing: -.02em; }
.feat-text .lead { margin: 0 0 24px; max-width: 520px; }
#hero h1 { font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 700; line-height: 1.12; margin: 18px 0 14px; letter-spacing: -.02em; color: var(--tx); }
.grad { background: linear-gradient(100deg, var(--cyan), var(--purple) 60%, var(--orange)); background-size: 200% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: shift 6s ease-in-out infinite alternate; }
@keyframes shift { to { background-position: 100% 0; } }
#typed { color: var(--cyan); }
.caret { display: inline-block; width: 3px; height: .9em; background: var(--cyan); margin-left: 3px; vertical-align: -0.08em; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.lead { font-size: clamp(1rem, 1.6vw, 1.25rem); color: var(--tx2); margin: 0 0 26px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.cta.center { justify-content: center; }
.btn-fill, .btn-line { display: inline-flex; align-items: center; gap: 8px; padding: 11px 22px; border-radius: 999px; font-weight: 500; font-size: 14px; transition: .25s; border: 1px solid var(--cyan); }
.btn-fill { background: linear-gradient(135deg, var(--cyan), #3b82f6); color: #04101f; border-color: transparent; box-shadow: 0 6px 26px rgba(0,212,255,.25); }
.btn-fill:hover { transform: translateY(-2px); box-shadow: 0 10px 34px rgba(0,212,255,.4); color: #04101f; }
.btn-line { background: rgba(0,212,255,.04); color: var(--cyan); }
.btn-line:hover { background: rgba(0,212,255,.14); transform: translateY(-2px); }
.copy-hint { font: 400 11px var(--mono); opacity: .7; border-left: 1px solid rgba(4,16,31,.35); padding-left: 8px; }
.stats { display: grid; grid-template-columns: repeat(3, auto); gap: 8px 32px; margin-top: 36px; justify-content: start; }
.stat b { display: block; font: 600 clamp(1.5rem, 3vw, 2.2rem)/1.1 var(--mono); color: var(--tx); }
.stat span { font-size: 12px; color: var(--mute); max-width: 130px; display: block; line-height: 1.3; }
.scroll-cue { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 2; font-size: 22px; color: var(--mute); animation: bob 1.8s ease-in-out infinite; }
@keyframes bob { 50% { transform: translate(-50%, 8px); } }

/* sections */
.sec { position: relative; z-index: 2; padding: 96px 0; }
.sec.alt { background: linear-gradient(180deg, transparent, rgba(11,18,36,.9) 12%, rgba(11,18,36,.9) 88%, transparent); }
.wrap { width: min(1180px, 100% - 32px); margin: 0 auto; }
.sec-title { font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 700; margin: 0 0 6px; display: flex; align-items: baseline; gap: 14px; }
.sec-title span { font: 400 .5em var(--mono); color: var(--cyan); }
.sec-sub { color: var(--mute); margin: 0 0 22px; font-size: 14px; }
.center { display: flex; justify-content: center; margin-top: 28px; }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* about */
.about { display: grid; grid-template-columns: 300px 1fr; gap: 56px; align-items: center; }
.about-photo { position: relative; width: 280px; aspect-ratio: 1; margin: 0 auto; transform-style: preserve-3d; transition: transform .15s; }
.about-photo img { width: 100%; height: 100%; object-fit: cover; border-radius: 28px; border: 1px solid var(--line); }
.photo-ring { position: absolute; inset: -10px; border-radius: 36px; border: 1px solid rgba(0,212,255,.35); transform: translateZ(-20px); box-shadow: 0 0 60px rgba(0,212,255,.15); }
.big { font-size: clamp(1.15rem, 2.2vw, 1.55rem); color: var(--tx); font-weight: 400; margin: 12px 0 24px; line-height: 1.4; }
.facts { display: grid; gap: 12px; }
.fact { display: flex; gap: 14px; align-items: center; padding: 14px 18px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; transition: .25s; }
.fact:hover { transform: translateX(6px); border-color: rgba(0,212,255,.5); }
.fact i { font-size: 22px; color: var(--cyan); }
.fact small { display: block; font: 400 11px var(--mono); color: var(--mute); text-transform: uppercase; letter-spacing: 1px; }

/* filter pills */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 28px; }
.pill { background: transparent; border: 1px solid var(--line); border-radius: 999px; padding: 7px 16px; font-size: 13px; color: var(--tx2); transition: .2s; display: inline-flex; gap: 8px; align-items: center; }
.pill em { font: normal 400 11px var(--mono); color: var(--mute); }
.pill:hover { border-color: var(--cyan); color: var(--cyan); }
.pill.on { background: rgba(0,212,255,.14); border-color: var(--cyan); color: var(--cyan); box-shadow: 0 0 18px rgba(0,212,255,.15); }

/* project tiles: photo + live simulation side by side */
.ptiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.ptile { position: relative; border-radius: var(--r); background: var(--card); border: 1px solid var(--line); overflow: hidden; transition: transform .25s, border-color .25s, box-shadow .25s; }
.ptile:hover { border-color: rgba(0,212,255,.55); box-shadow: 0 14px 44px rgba(0,0,0,.5), 0 0 30px rgba(0,212,255,.1); transform: translateY(-4px); }
.ptile.hide { display: none; }
.pt-media { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: #060a14; }
.pt-img, .pt-sim { position: relative; display: block; aspect-ratio: 8 / 5; overflow: hidden; border: 0; padding: 0; margin: 0; background: #0d1426; cursor: pointer; color: inherit; text-align: left; }
.pt-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.ptile:hover .pt-img img { transform: scale(1.05); }
.pt-sim { background: #060a14; }
.pt-sim canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.pt-live { position: absolute; left: 8px; top: 8px; z-index: 2; display: inline-flex; align-items: center; gap: 6px; font: 600 9px var(--mono); letter-spacing: 1.4px; text-transform: uppercase; color: #39ff6a; padding: 3px 8px; border-radius: 999px; background: rgba(6,10,20,.8); }
.pt-live i { width: 6px; height: 6px; border-radius: 50%; background: #39ff6a; box-shadow: 0 0 8px #39ff6a; animation: hsblink 1.6s ease-in-out infinite; }
.pt-hint { position: absolute; right: 8px; bottom: 8px; z-index: 3; font: 500 10.5px var(--mono); padding: 4px 10px; border-radius: 999px; background: rgba(8,13,26,.88); border: 1px solid var(--cyan); color: var(--cyan); opacity: 0; transform: translateY(5px); transition: .25s; pointer-events: none; }
.pt-img:hover .pt-hint, .pt-sim:hover .pt-hint, .pt-img:focus-visible .pt-hint, .pt-sim:focus-visible .pt-hint { opacity: 1; transform: none; }
.pt-over { position: absolute; inset: 0; z-index: 2; display: flex; align-items: flex-end; padding: 10px 10px 34px; font-size: 11.5px; line-height: 1.45; color: #e2e8f0; background: linear-gradient(0deg, rgba(4,8,18,.94), rgba(4,8,18,.4) 62%, transparent); opacity: 0; transition: opacity .25s; pointer-events: none; }
.pt-sim:hover .pt-over { opacity: 1; }
.pt-cap { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; padding: 12px 16px 15px; }
.pt-cap h3 { margin: 0; font-size: 1.02rem; font-weight: 600; line-height: 1.3; flex: 1 1 auto; min-width: 0; }
.pt-cap h3 a { color: var(--tx); }
.pt-cap h3 a:hover { color: var(--cyan); }
.badge { display: inline-block; align-self: flex-start; width: fit-content; font: 500 10px var(--mono); letter-spacing: 1px; text-transform: uppercase; padding: 3px 9px; border-radius: 999px; background: rgba(139,92,246,.18); color: #c4b5fd; border: 1px solid rgba(139,92,246,.4); }
.badge.chips { background: rgba(255,138,61,.14); color: #ffb582; border-color: rgba(255,138,61,.4); }
.badge.fpga { background: rgba(0,212,255,.12); color: #7ee8ff; border-color: rgba(0,212,255,.4); }
.badge.embedded { background: rgba(16,185,129,.14); color: #6ee7b7; border-color: rgba(16,185,129,.4); }
.hooks { display: flex; flex-wrap: wrap; gap: 6px; flex-basis: 100%; }
.hook { font: 400 11px var(--mono); color: var(--tx2); background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.08); border-radius: 6px; padding: 2px 8px; }
.hook.hot { color: var(--bg); background: var(--cyan); border-color: var(--cyan); font-weight: 600; }

/* modal */
.modal { position: fixed; inset: 0; z-index: 300; display: grid; place-items: center; padding: 16px; background: rgba(4,8,18,.78); backdrop-filter: blur(8px); animation: fade .2s; }
.modal[hidden] { display: none; }
@keyframes fade { from { opacity: 0; } }
.modal-card { position: relative; width: min(980px, 100%); max-height: calc(100vh - 32px); overflow: auto; display: grid; grid-template-columns: 1.1fr 1fr; background: var(--card); border: 1px solid var(--line); border-radius: 22px; box-shadow: 0 30px 90px rgba(0,0,0,.7); animation: pop .28s cubic-bezier(.2,.9,.3,1.2); }
@keyframes pop { from { transform: scale(.94) translateY(14px); opacity: 0; } }
.modal-img { background: #0b1224; display: grid; place-items: center; min-height: 260px; }
.modal-img img { width: 100%; height: 100%; object-fit: contain; max-height: 70vh; }
.modal-body { padding: 28px; display: flex; flex-direction: column; gap: 14px; }
.modal-body h3 { margin: 0; font-size: 1.5rem; line-height: 1.25; }
.modal-x { position: absolute; top: 12px; right: 12px; z-index: 2; width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line); background: rgba(8,13,26,.8); }
.modal-x:hover { border-color: var(--cyan); color: var(--cyan); }
.facts-dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 0; font-size: 13px; }
.facts-dl dt { font: 400 11px var(--mono); color: var(--mute); text-transform: uppercase; letter-spacing: .8px; padding-top: 3px; }
.facts-dl dd { margin: 0; color: var(--tx2); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tags span { font: 400 11px var(--mono); color: var(--cyan); border: 1px solid rgba(0,212,255,.3); border-radius: 4px; padding: 2px 8px; }
.modal-actions { display: flex; gap: 10px; margin-top: auto; padding-top: 8px; }
.modal-actions .btn-line { padding: 11px 16px; }

/* skills */
.skill-chips { display: flex; flex-wrap: wrap; gap: 12px; min-height: 170px; }
.chip { display: flex; align-items: center; gap: 12px; padding: 12px 18px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; transition: .25s; animation: chipin .45s both; }
.chip:hover { transform: translateY(-4px) scale(1.03); border-color: var(--cyan); box-shadow: 0 10px 30px rgba(0,212,255,.15); }
.chip img { width: 34px; height: 34px; object-fit: contain; border-radius: 6px; background: #fff; padding: 2px; }
.chip b { display: block; font-weight: 500; font-size: 15px; line-height: 1.2; }
.chip small { display: block; color: var(--mute); font-size: 12px; }
@keyframes chipin { from { opacity: 0; transform: translateY(14px) scale(.96); } }

/* timeline */
.timeline { position: relative; display: grid; gap: 26px; padding-left: 34px; }
.timeline::before { content: ''; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--cyan), var(--purple), transparent); }
.tl { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 22px 24px; transition: .25s; }
.tl::before { content: ''; position: absolute; left: -33px; top: 28px; width: 14px; height: 14px; border-radius: 50%; background: var(--bg); border: 3px solid var(--cyan); box-shadow: 0 0 14px var(--cyan); }
.tl:hover { border-color: rgba(0,212,255,.5); }
.tl-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px; align-items: baseline; }
.tl h3 { margin: 0; font-size: 1.15rem; }
.tl h3 span { color: var(--mute); font-weight: 300; font-size: .85em; }
.tl-meta { font: 400 12px var(--mono); color: var(--mute); }
.metrics { display: flex; flex-wrap: wrap; gap: 12px; margin: 16px 0 6px; }
.metric { flex: 1 1 130px; background: rgba(0,212,255,.06); border: 1px solid rgba(0,212,255,.2); border-radius: 12px; padding: 10px 14px; }
.metric b { display: block; font: 600 1.6rem/1.1 var(--mono); color: var(--cyan); }
.metric span { font-size: 12px; color: var(--tx2); line-height: 1.3; display: block; }
.more { background: none; border: 0; color: var(--cyan); font-size: 13px; padding: 6px 0; display: inline-flex; gap: 6px; align-items: center; }
.more i { transition: transform .25s; }
.more[aria-expanded="true"] i { transform: rotate(180deg); }
.tl ul { margin: 6px 0 0; padding-left: 18px; color: var(--tx2); font-size: 14px; display: none; }
.tl ul.open { display: block; animation: fade .3s; }

/* courses */
.course-layout { display: grid; grid-template-columns: 1fr 340px; gap: 24px; align-items: start; }
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(165px, 1fr)); gap: 10px; }
.course { text-align: left; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; transition: .2s; }
.course:hover { border-color: var(--cyan); transform: translateY(-3px); }
.course.on { border-color: var(--cyan); background: rgba(0,212,255,.1); box-shadow: 0 0 22px rgba(0,212,255,.15); }
.course.hide { display: none; }
.course b { display: block; font: 600 13px var(--mono); color: var(--cyan); }
.course span { display: block; font-size: 12px; color: var(--tx2); line-height: 1.3; margin-top: 3px; }
.course-detail { position: sticky; top: 90px; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 22px; min-height: 180px; }
.course-detail .code { font: 600 1.7rem var(--mono); color: var(--cyan); }
.course-detail h4 { margin: 4px 0 10px; font-size: 1.05rem; }
.course-detail p { margin: 0; font-size: 14px; color: var(--tx2); }

/* music */
.songs { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.song { position: relative; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); background: var(--card); min-height: 130px; }
.song.hide { display: none; }
.song button { display: block; width: 100%; height: 100%; min-height: 130px; border: 0; padding: 16px; text-align: left; position: relative; overflow: hidden; background: linear-gradient(135deg, hsl(var(--h) 70% 22%), hsl(calc(var(--h) + 50) 70% 12%)); }
.song button::before { content: ''; position: absolute; width: 140px; height: 140px; right: -40px; top: -40px; border-radius: 50%; background: hsl(var(--h) 90% 60% / .22); transition: transform .5s; }
.song:hover button::before { transform: scale(1.5); }
.song b { position: relative; display: block; font-weight: 600; font-size: 1.02rem; line-height: 1.25; max-width: 80%; }
.song small { position: relative; font: 400 11px var(--mono); color: rgba(255,255,255,.65); text-transform: uppercase; letter-spacing: 1px; }
.song .play { position: absolute; right: 14px; bottom: 14px; width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: var(--cyan); color: #04101f; font-size: 20px; transition: .25s; box-shadow: 0 0 20px rgba(0,212,255,.5); }
.song:hover .play { transform: scale(1.15); }
.eq { position: absolute; left: 16px; bottom: 16px; display: flex; gap: 3px; align-items: flex-end; height: 22px; opacity: .8; }
.eq i { width: 4px; background: hsl(var(--h) 90% 65%); border-radius: 2px; height: 30%; }
.song:hover .eq i { animation: eq .8s ease-in-out infinite alternate; }
.eq i:nth-child(2) { animation-delay: .15s !important; } .eq i:nth-child(3) { animation-delay: .3s !important; } .eq i:nth-child(4) { animation-delay: .45s !important; }
@keyframes eq { to { height: 100%; } }
.song iframe { display: block; width: 100%; height: 166px; border: 0; }
.videos { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.vid { display: block; position: relative; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); }
.vid.hide { display: none; }
.vid img { width: 100%; aspect-ratio: 16/9; object-fit: cover; transition: transform .5s; }
.vid:hover img { transform: scale(1.06); }
.vid .pl { position: absolute; inset: 0; display: grid; place-items: center; font-size: 54px; color: #fff; background: rgba(0,0,0,.25); opacity: .85; transition: .25s; }
.vid:hover .pl { background: rgba(0,0,0,.05); color: var(--cyan); }
.vid span { position: absolute; left: 0; right: 0; bottom: 0; padding: 22px 12px 10px; font: 400 12px var(--mono); background: linear-gradient(transparent, rgba(0,0,0,.85)); color: #fff; }

/* contact + footer */
.contact { text-align: center; padding: 70px 20px; border-radius: 28px; border: 1px solid var(--line); background: radial-gradient(600px circle at 50% 0%, rgba(0,212,255,.14), transparent 70%), var(--card); }
.contact h2 { font-size: clamp(1.8rem, 5vw, 3.2rem); font-weight: 700; margin: 0 0 26px; letter-spacing: -.02em; background: linear-gradient(100deg, var(--tx), var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent; }
footer { position: relative; z-index: 2; text-align: center; padding: 30px 0 50px; color: var(--mute); font-size: 13px; }
.socials { display: flex; gap: 18px; justify-content: center; font-size: 22px; margin-bottom: 8px; }
.socials a { color: var(--mute); } .socials a:hover { color: var(--cyan); transform: translateY(-3px); }
#toast { position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 30px); opacity: 0; z-index: 400; background: var(--cyan); color: #04101f; font-weight: 500; font-size: 14px; padding: 10px 20px; border-radius: 999px; transition: .3s; pointer-events: none; }
#toast.show { opacity: 1; transform: translate(-50%, 0); }

/* responsive */
@media (max-width: 900px) {
  #nav { position: fixed; top: 58px; left: 12px; right: 12px; flex-direction: column; padding: 10px; background: rgba(8,13,26,.96); backdrop-filter: blur(14px); border: 1px solid var(--line); border-radius: 16px; display: none; }
  #nav.open { display: flex; }
  #nav a { padding: 12px 14px; }
  #menu { display: block; }
  .stats { grid-template-columns: repeat(2, auto); }
  .about { grid-template-columns: 1fr; gap: 32px; }
  .ptiles { grid-template-columns: minmax(0, 1fr); }
  .course-layout { grid-template-columns: 1fr; }
  .course-detail { position: static; order: -1; }
  .modal-card { grid-template-columns: 1fr; }
  .modal-img { min-height: 200px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001s !important; transition-duration: .001s !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 560px) { .pt-media { grid-template-columns: minmax(0, 1fr); } }