/* Ngo Minh Khoi — "annual report" editorial theme */
:root{
  --paper:#f7f4ee;
  --paper-2:#fffdf9;
  --alt:#efeae0;
  --ink:#13213c;
  --ink-2:#2a3a5c;
  --muted:#5f6878;
  --line:#e2dbcd;
  --green:#0e7a5c;
  --green-2:#12a07a;
  --green-soft:#dcefe6;
  --gold:#b98a1b;
  --gold-soft:#f5ead0;
  --coral:#d9623c;
  --coral-soft:#fae3d9;
  --serif:"Fraunces", Georgia, "Times New Roman", serif;
  --sans:"Plus Jakarta Sans", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --r:16px;
  --shadow:0 1px 2px rgba(19,33,60,.05), 0 12px 32px -12px rgba(19,33,60,.18);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* language toggle */
html[lang="en"] [data-vi], html[lang="vi"] [data-en]{display:none !important}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(247,244,238,.86);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid transparent;transition:border-color .2s, box-shadow .2s}
.nav.scrolled{border-color:var(--line);box-shadow:0 6px 24px -18px rgba(19,33,60,.4)}
.nav-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;letter-spacing:-.01em}
.brand-mark{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:10px;background:var(--ink);color:var(--paper);font-family:var(--serif);font-size:.7rem;font-weight:700;letter-spacing:.02em}
.brand-name{font-size:.98rem}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{padding:8px 12px;border-radius:999px;text-decoration:none;font-size:.87rem;font-weight:500;color:var(--ink-2);transition:background .2s,color .2s}
.nav-links a:hover{background:var(--alt)}
.nav-links a.active{background:var(--ink);color:var(--paper)}
.nav-actions{display:flex;align-items:center;gap:8px}
.lang{border:1px solid var(--line);background:var(--paper-2);border-radius:999px;padding:6px 12px;font:600 .78rem var(--sans);color:var(--muted);cursor:pointer;letter-spacing:.04em}
.lang .l-sep{margin:0 4px;opacity:.5}
html[lang="en"] .lang .l-en, html[lang="vi"] .lang .l-vi{color:var(--green)}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:var(--paper-2);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:4px}
.burger span{width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s, opacity .2s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{padding:72px 0 40px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(600px 380px at 85% 20%, rgba(14,122,92,.10), transparent 70%),
  radial-gradient(500px 300px at 10% 90%, rgba(217,98,60,.07), transparent 70%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.25fr .9fr;gap:56px;align-items:center;position:relative}
.eyebrow{margin:0 0 18px;font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--green)}
.hero h1{font-family:var(--serif);font-weight:600;font-size:clamp(2.6rem,6.2vw,4.6rem);line-height:1.02;letter-spacing:-.025em;margin:0 0 22px}
.lede{font-size:1.18rem;line-height:1.6;color:var(--ink-2);margin:0 0 16px;max-width:36em}
.school{font-size:.9rem;color:var(--muted);margin:0 0 28px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:999px;font-weight:600;font-size:.92rem;text-decoration:none;transition:transform .15s, background .2s, box-shadow .2s}
.btn:hover{transform:translateY(-1px)}
.btn-solid{background:var(--ink);color:var(--paper);box-shadow:0 8px 20px -10px rgba(19,33,60,.6)}
.btn-solid:hover{background:var(--green)}
.btn-ghost{border:1.5px solid var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}

.hero-visual{position:relative;justify-self:center;width:100%;max-width:360px}
.portrait{position:relative;border-radius:24px;overflow:hidden;box-shadow:var(--shadow);aspect-ratio:4/5;background:var(--alt)}
.portrait img{width:100%;height:100%;object-fit:cover;object-position:50% 30%}
.hero-visual::before{content:"";position:absolute;inset:-14px 14px 14px -14px;border:1.5px solid var(--green);border-radius:28px;z-index:-1}
.float-card{position:absolute;left:-36px;bottom:28px;background:var(--paper-2);border:1px solid var(--line);border-radius:14px;padding:12px 16px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:2px;max-width:240px}
.fc-label{font-size:.68rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--coral)}
.float-card b{font-family:var(--serif);font-weight:600;font-size:1rem;line-height:1.25}
.fc-sub{font-size:.76rem;color:var(--muted)}

.ledger{display:grid;grid-template-columns:repeat(4,1fr);margin:64px 0 0;border-top:1.5px solid var(--ink);border-bottom:1px solid var(--line)}
.ledger>div{padding:20px 18px 18px;border-right:1px solid var(--line)}
.ledger>div:last-child{border-right:0}
.ledger dt{font-family:var(--serif);font-size:2.3rem;font-weight:600;line-height:1;color:var(--green);font-variant-numeric:tabular-nums}
.ledger dd{margin:8px 0 0;font-size:.82rem;color:var(--muted);line-height:1.4}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section.alt{background:var(--alt)}
.sec-head{margin-bottom:36px}
.sec-num{display:block;font-family:var(--serif);font-size:.95rem;font-weight:600;color:var(--coral);margin-bottom:6px;letter-spacing:.02em}
.sec-head h2{font-family:var(--serif);font-weight:600;font-size:clamp(1.8rem,3.6vw,2.6rem);letter-spacing:-.02em;line-height:1.1;margin:0}
.sec-sub{margin:10px 0 0;color:var(--muted);font-size:.9rem;font-weight:500}
.two-col{display:grid;grid-template-columns:280px 1fr;gap:48px}
.two-col .sec-head{margin:0}
.big{font-size:1.2rem;line-height:1.7;color:var(--ink-2);margin:0}
.big em{font-style:normal;color:var(--green);font-weight:600}
.chips{list-style:none;padding:0;margin:26px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.chips li{padding:7px 14px;border-radius:999px;background:var(--paper-2);border:1px solid var(--line);font-size:.84rem;font-weight:500}

.tag{display:inline-block;padding:4px 11px;border-radius:999px;font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase}
.tag-green{background:var(--green-soft);color:var(--green)}
.tag-gold{background:var(--gold-soft);color:var(--gold)}
.tag-coral{background:var(--coral-soft);color:var(--coral)}
.when{font-size:.74rem;font-weight:600;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}

/* project */
.project-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:start}
.project-main{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);padding:32px;box-shadow:var(--shadow)}
.project-main h3{font-family:var(--serif);font-weight:600;font-size:1.6rem;line-height:1.2;letter-spacing:-.01em;margin:14px 0 14px}
.project-main p{margin:0 0 12px;color:var(--ink-2)}
.note{font-size:.9rem;color:var(--muted)!important;border-left:3px solid var(--coral);padding-left:12px;margin-top:18px!important}
.steps{list-style:none;margin:0;padding:6px 0 0;position:relative}
.steps::before{content:"";position:absolute;left:7px;top:14px;bottom:14px;width:2px;background:var(--line)}
.steps li{position:relative;padding:0 0 22px 34px;font-size:.95rem}
.steps li::before{content:"";position:absolute;left:0;top:5px;width:16px;height:16px;border-radius:50%;background:var(--paper);border:2px solid var(--green)}
.steps li.on::before{background:var(--green);box-shadow:0 0 0 5px var(--green-soft)}
.steps li.next::before{border-color:var(--muted);border-style:dashed}
.steps li.next{color:var(--muted)}
.steps time{display:block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--green);margin-bottom:2px}
.steps li.next time{color:var(--muted)}

/* roles */
.roles{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.roles .role{grid-column:span 2}
.roles .role:nth-child(4),.roles .role:nth-child(5){grid-column:span 3}
.role{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);padding:24px;position:relative;transition:transform .2s, box-shadow .2s}
.role:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.role::after{content:"";position:absolute;left:24px;top:0;width:36px;height:3px;background:var(--green);border-radius:0 0 3px 3px}
.role h3{font-family:var(--serif);font-weight:600;font-size:1.22rem;line-height:1.25;margin:10px 0 6px}
.pos{margin:0;color:var(--green);font-weight:600;font-size:.9rem}
.desc{margin:10px 0 0;font-size:.88rem;color:var(--muted)}
.role-link{display:inline-block;margin-top:12px;font-size:.84rem;font-weight:600;color:var(--green);text-decoration:none;border-bottom:1.5px solid var(--green-soft)}
.role-link:hover{border-color:var(--green)}

/* INOVA 2026 photos */
.inova-shots{display:grid;grid-template-columns:.75fr 1.25fr;gap:18px;margin-top:28px;align-items:start}
.inova-shots figure{margin:0}
.inova-shots a{display:block;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);background:var(--paper-2)}
.inova-shots img{width:100%;object-fit:cover;transition:transform .5s}
.inova-shots .tall img{aspect-ratio:4/5}
.inova-shots .wide img{aspect-ratio:4/3}
.inova-shots a:hover img{transform:scale(1.03)}
.inova-shots figcaption{font-size:.84rem;color:var(--muted);margin-top:8px}

/* ventures */
.ventures{display:grid;grid-template-columns:1.5fr 1fr;gap:22px}
.venture{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);padding:32px;display:flex;flex-direction:column}
.venture.feature{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.venture.feature .pos{color:#7fdcbc}
.venture.feature .when{color:rgba(247,244,238,.6)}
.venture.feature p{color:rgba(247,244,238,.85)}
.v-top{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:6px 14px}
.venture h3{font-family:var(--serif);font-weight:600;font-size:1.9rem;letter-spacing:-.015em;margin:0}
.venture .pos{margin:6px 0 14px}
.venture p{margin:0 0 14px}
.ticks{list-style:none;padding:0;margin:8px 0 0;display:grid;gap:10px}
.ticks li{position:relative;padding-left:28px;font-size:.93rem;color:rgba(247,244,238,.9)}
.ticks li::before{content:"";position:absolute;left:0;top:4px;width:16px;height:16px;border-radius:50%;background:var(--green-2) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/100% no-repeat}
.quote{margin-top:auto;padding-top:18px;border-top:1px dashed var(--line);font-family:var(--serif);font-style:italic;color:var(--muted)}

/* community */
.trip-intro{max-width:820px;margin-bottom:30px}
.hero-shot{display:block;border-radius:20px;overflow:hidden;box-shadow:var(--shadow);margin-bottom:44px}
.hero-shot img{width:100%;aspect-ratio:16/8;object-fit:cover;object-position:50% 60%;transition:transform .6s}
.hero-shot:hover img{transform:scale(1.02)}
.day{margin-top:36px}
.day-label{display:flex;align-items:baseline;gap:14px;margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.day-label b{font-family:var(--serif);font-size:1.35rem;font-weight:600}
.day-label>span{font-size:.88rem;color:var(--muted)}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.grid4 figure{margin:0}
.grid4 a{display:block;border-radius:14px;overflow:hidden;background:var(--alt)}
.grid4 img{width:100%;aspect-ratio:3/4;object-fit:cover;transition:transform .5s}
.grid4 a:hover img, .strip a:hover img{transform:scale(1.04)}
.grid4 figcaption{font-size:.84rem;color:var(--muted);margin-top:8px;line-height:1.4}
.moment{margin-top:26px}
.day-label + .moment{margin-top:6px}
.m-title{display:flex;align-items:center;gap:10px;margin:0 0 12px;font-size:.98rem;font-weight:700;letter-spacing:-.005em;color:var(--ink)}
.m-title::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--green);flex:none}
.m-title small{font-size:.7rem;font-weight:700;color:var(--muted);background:var(--paper-2);border:1px solid var(--line);border-radius:999px;padding:1px 8px}
.m-grid{display:grid;grid-template-columns:repeat(var(--n,4),1fr);gap:14px}
.m-grid figure{margin:0;min-width:0}
.m-grid a{display:block;border-radius:14px;overflow:hidden;background:var(--alt)}
.m-grid img{width:100%;aspect-ratio:3/4;object-fit:cover;transition:transform .5s}
.m-grid[style*="--n:3"] img{aspect-ratio:4/4}
.m-grid a:hover img{transform:scale(1.04)}
.m-grid figcaption{font-size:.82rem;color:var(--muted);margin-top:7px;line-height:1.4}
.strip{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.strip a{display:block;border-radius:12px;overflow:hidden}
.strip img{width:100%;aspect-ratio:1/1;object-fit:cover;transition:transform .5s}

/* competitions & courses */
.comp-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.comp{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);padding:28px}
.comp h3{font-family:var(--serif);font-weight:600;font-size:1.35rem;margin:14px 0 8px}
.comp p{margin:0;color:var(--muted);font-size:.93rem}
.score{display:flex;align-items:baseline;gap:2px;margin:4px 0 6px}
.score b{font-family:var(--serif);font-size:2.4rem;font-weight:600;color:var(--gold);line-height:1}
.score span{font-weight:600;color:var(--muted)}
.sub-h{font-family:var(--serif);font-weight:600;font-size:1.3rem;margin:52px 0 18px}
.sub-h small{font-family:var(--sans);font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-left:8px}
.courses{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.course{background:var(--paper-2);border:1px solid var(--line);border-radius:14px;padding:18px 18px 20px;display:flex;flex-direction:column;gap:6px;border-top:3px solid var(--green)}
.course .org{font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.course b{font-size:.98rem;line-height:1.35}

/* research */
.paper{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);padding:36px 40px;position:relative;overflow:hidden;box-shadow:var(--shadow)}
.paper::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:linear-gradient(var(--green),var(--coral))}
.paper h3{font-family:var(--serif);font-weight:600;font-size:clamp(1.3rem,2.4vw,1.75rem);line-height:1.25;letter-spacing:-.01em;margin:16px 0 14px;max-width:30em}
.paper p{margin:0;color:var(--ink-2);max-width:48em}

/* footer */
.footer{background:var(--ink);color:rgba(247,244,238,.75);padding:36px 0}
.foot-inner{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.footer .brand-mark{background:var(--paper);color:var(--ink)}
.footer p{margin:0;font-size:.88rem}
.to-top{margin-left:auto;font-size:.85rem;font-weight:600;text-decoration:none;color:var(--paper)}

/* lightbox */
.lb{position:fixed;inset:0;z-index:100;background:rgba(10,16,30,.92);display:none;align-items:center;justify-content:center;padding:24px}
.lb.open{display:flex}
.lb figure{margin:0;max-width:min(92vw,1100px);text-align:center}
.lb img{max-height:82vh;width:auto;margin:0 auto;border-radius:10px}
.lb figcaption{color:rgba(255,255,255,.8);font-size:.9rem;margin-top:12px}
.lb button{position:absolute;background:rgba(255,255,255,.1);border:0;color:#fff;width:48px;height:48px;border-radius:50%;font-size:1.8rem;line-height:1;cursor:pointer}
.lb button:hover{background:rgba(255,255,255,.22)}
.lb-close{top:18px;right:18px}
.lb-prev{left:18px;top:50%;transform:translateY(-50%)}
.lb-next{right:18px;top:50%;transform:translateY(-50%)}

/* reveal */
.rv{opacity:0;transform:translateY(18px);transition:opacity .7s ease, transform .7s ease}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .nav-links{position:fixed;top:64px;left:0;right:0;flex-direction:column;gap:0;background:var(--paper-2);border-bottom:1px solid var(--line);padding:8px 16px 16px;box-shadow:0 20px 30px -20px rgba(19,33,60,.35);transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .2s, transform .2s}
  .nav-links.open{opacity:1;transform:none;pointer-events:auto}
  .nav-links a{padding:12px 10px;border-radius:10px}
  .nav-actions{margin-left:auto}
  .burger{display:flex}
  .courses{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .hero{padding:44px 0 32px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-visual{max-width:300px}
  .float-card{left:-18px}
  .ledger{grid-template-columns:repeat(2,1fr);margin-top:48px}
  .ledger>div:nth-child(2){border-right:0}
  .ledger>div:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .two-col, .project-grid, .ventures, .comp-grid{grid-template-columns:1fr;gap:24px}
  .roles{grid-template-columns:1fr 1fr}
  .roles .role, .roles .role:nth-child(4), .roles .role:nth-child(5){grid-column:auto}
  .roles .role:nth-child(5){grid-column:1/-1}
  .grid4{grid-template-columns:repeat(2,1fr)}
  .m-grid{grid-template-columns:repeat(2,1fr)}
  .m-grid figure:last-child:nth-child(odd){grid-column:1/-1}
  .m-grid figure:last-child:nth-child(odd) img{aspect-ratio:16/10}
  .inova-shots{grid-template-columns:1fr 1fr}
  .strip{grid-template-columns:repeat(3,1fr)}
  .section{padding:64px 0}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  .brand-name{display:none}
  .lede, .big{font-size:1.05rem}
  .project-main, .venture, .paper{padding:24px}
  .hero-shot img{aspect-ratio:4/3}
  .grid4, .m-grid{gap:10px}
  .inova-shots{grid-template-columns:1fr}
  .courses{grid-template-columns:1fr}
  .roles{grid-template-columns:1fr}
  .to-top{margin-left:0}
  .lb-prev, .lb-next{top:auto;bottom:18px;transform:none}
}

/* projects in action */
.proj-tabs{display:flex;flex-wrap:wrap;gap:8px;margin:-8px 0 8px}
.proj-tabs a{padding:7px 14px;border-radius:999px;background:var(--paper-2);border:1px solid var(--line);font-size:.84rem;font-weight:600;text-decoration:none;color:var(--ink-2);transition:background .2s,color .2s}
.proj-tabs a:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.proj{margin-top:48px;padding-top:28px;border-top:1.5px solid var(--ink)}
.proj-head{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px 16px;margin-bottom:8px}
.proj-head h3{font-family:var(--serif);font-weight:600;font-size:clamp(1.4rem,2.6vw,1.9rem);letter-spacing:-.015em;margin:0}
.proj-desc{margin:0 0 22px;max-width:52em;color:var(--ink-2)}
.proj .hero-shot{margin-bottom:16px}
.proj .hero-shot img{aspect-ratio:16/7}
@media (max-width:520px){.proj .hero-shot img{aspect-ratio:4/3}}