/* ===== KHÓA HỌC ONLINE — Tri thức Việt (giao diện kiểu trang bán khóa học, tất cả khóa miễn phí) ===== */
:root { --kh-blue:#2563eb; --kh-sky:#0284c7; --kh-cyan:#38bdf8; --kh-night:#0a1230; --kh-ink:#0c1330; --kh-ink2:#3b4462; --kh-muted:#6a7291; --kh-hair:#e6e9f1; --kh-bg:#f6f8fc; --kh-green:#16a34a; --kh-amber:#d97706; --kh-red:#dc2626;
  --kh-lift:0 1px 0 rgba(12,19,48,.03),0 18px 40px -26px rgba(12,19,48,.3); --kh-ease:cubic-bezier(.22,1,.36,1); --kh-sans:"Be Vietnam Pro",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif; }
* { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body { font-family:var(--kh-sans); color:var(--kh-ink); background:var(--kh-bg); -webkit-font-smoothing:antialiased; line-height:1.5; min-height:100vh; }
a { color:inherit; text-decoration:none; } button { font-family:inherit; cursor:pointer; border:none; background:none; color:inherit; } img { max-width:100%; display:block; }
:focus-visible { outline:3px solid rgba(56,189,248,.7); outline-offset:2px; border-radius:8px; }
.kh-wrap { max-width:1200px; margin:0 auto; padding:0 1.25rem; }
/* header */
.kh-top { position:sticky; top:0; z-index:60; background:#fff; border-bottom:1px solid var(--kh-hair); padding-top:env(safe-area-inset-top,0); }
.kh-top-in { max-width:1200px; margin:0 auto; padding:.8rem 1.5rem; display:flex; align-items:center; gap:1.2rem; }
.kh-brand { display:flex; align-items:center; gap:.7rem; flex:none; } .kh-brand img { height:50px; width:auto; } .kh-brand span { font-weight:800; font-size:.78rem; letter-spacing:.07em; text-transform:uppercase; color:var(--kh-sky); padding-left:.7rem; border-left:1px solid var(--kh-hair); white-space:nowrap; }
.kh-nav { display:flex; gap:.2rem; margin-left:.5rem; } .kh-nav a { padding:.5rem .7rem; border-radius:10px; font-size:.95rem; font-weight:500; color:var(--kh-ink2); white-space:nowrap; } .kh-nav a:hover, .kh-nav a.on { background:#eef4ff; color:var(--kh-blue); }
.kh-auth { margin-left:auto; display:flex; align-items:center; gap:.5rem; position:relative; }
.kh-menu { display:none; width:40px; height:40px; border-radius:10px; font-size:1.1rem; } .kh-menu:hover { background:#eef4ff; }
.kh-user { display:flex; align-items:center; gap:.55rem; padding:.3rem .7rem .3rem .3rem; border:1px solid var(--kh-hair); border-radius:99px; font-size:.86rem; font-weight:600; background:#fff; }
.kh-av { width:30px; height:30px; border-radius:50%; background:linear-gradient(135deg,#38bdf8,#2563eb); color:#fff; display:grid; place-items:center; font-size:.76rem; font-weight:800; }
.kh-pop { position:absolute; right:0; top:calc(100% + 8px); min-width:230px; background:#fff; border:1px solid var(--kh-hair); border-radius:14px; box-shadow:0 20px 50px -20px rgba(12,19,48,.4); padding:.4rem; display:none; z-index:70; }
.kh-pop.open { display:block; } .kh-pop a, .kh-pop button { display:flex; gap:.6rem; align-items:center; width:100%; text-align:left; padding:.6rem .8rem; border-radius:9px; font-size:.88rem; font-weight:600; } .kh-pop a:hover, .kh-pop button:hover { background:#f3f6ff; } .kh-pop i { width:18px; color:var(--kh-sky); }
@media (max-width:1400px) { .kh-brand span { display:none; } }
@media (max-width:1180px) { .kh-nav a.site { display:none; } .kh-nav a { padding:.5rem .6rem; font-size:.9rem; } .kh-top-in { gap:.8rem; } }
@media (max-width:1100px) { .kh-brand img { height:42px; } .kh-nav a { padding:.45rem .5rem; } .kh-top .kh-btn { padding:.55rem .85rem; } }
.kh-short { display:none; }
@media (max-width:520px) { .kh-auth .kh-btn-ghost { display:none; } .kh-top .kh-btn { padding:.5rem .8rem; font-size:.82rem; } .kh-brand img { height:30px; } .kh-long { display:none; } .kh-short { display:inline; } .kh-top-in { padding-left:.8rem; padding-right:.8rem; gap:.5rem; } }
@media (max-width:960px) { .kh-nav a.site { display:block; } .kh-nav { display:none; position:absolute; left:0; right:0; top:100%; background:#fff; border-bottom:1px solid var(--kh-hair); flex-direction:column; padding:.6rem 1.25rem 1rem; margin:0; } .kh-nav.open { display:flex; } .kh-menu { display:grid; place-items:center; margin-left:auto; } .kh-auth { margin-left:0; } .kh-brand span { display:none; } .kh-user span.nm { display:none; } .kh-user { padding:.3rem; } }
/* buttons */
.kh-top .kh-btn { padding:.6rem 1rem; font-size:.84rem; }
.kh-btn { display:inline-flex; align-items:center; justify-content:center; gap:.5rem; padding:.7rem 1.25rem; border-radius:12px; font-weight:700; font-size:.92rem; transition:transform .2s var(--kh-ease),box-shadow .2s,background .2s; white-space:nowrap; }
.kh-btn-primary { background:linear-gradient(135deg,#38bdf8,#2563eb); color:#fff; box-shadow:0 12px 24px -12px rgba(37,99,235,.8); } .kh-btn-primary:hover { transform:translateY(-2px); }
.kh-btn-ghost { background:#fff; border:1px solid var(--kh-hair); color:var(--kh-ink2); } .kh-btn-ghost:hover { background:#f0f4ff; }
.kh-btn-green { background:linear-gradient(135deg,#22c55e,#16a34a); color:#fff; box-shadow:0 12px 24px -12px rgba(22,163,74,.7); }
.kh-btn-lg { padding:.95rem 1.6rem; font-size:1rem; border-radius:14px; } .kh-btn-block { width:100%; } .kh-btn[disabled] { opacity:.55; pointer-events:none; }
/* hero storefront */
.kh-hero { background:radial-gradient(70% 120% at 100% 0%,rgba(56,189,248,.35),transparent 60%),radial-gradient(50% 90% at 0% 100%,rgba(190,242,100,.14),transparent 60%),linear-gradient(155deg,#0a1230 0%,#111f52 55%,#17307a 100%); color:#fff; padding:3.5rem 0 4.5rem; position:relative; overflow:hidden; }
.kh-hero-in { display:grid; grid-template-columns:1.15fr .85fr; gap:2.5rem; align-items:center; }
.kh-pill { display:inline-flex; gap:.5rem; align-items:center; background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.2); padding:.35rem .9rem; border-radius:99px; font-size:.8rem; font-weight:700; letter-spacing:.04em; }
.kh-hero h1 { font-size:clamp(1.9rem,4.4vw,3rem); font-weight:800; line-height:1.15; letter-spacing:-.025em; margin:1rem 0 .8rem; text-wrap:balance; }
.kh-hero h1 em { font-style:normal; background:linear-gradient(90deg,#7dd3fc,#bef264); -webkit-background-clip:text; background-clip:text; color:transparent; }
.kh-hero p.lead { color:#c9d6f7; font-size:1.08rem; max-width:560px; line-height:1.65; }
.kh-search { display:flex; gap:.5rem; margin-top:1.6rem; background:#fff; border-radius:16px; padding:.4rem; max-width:560px; box-shadow:0 24px 50px -24px rgba(0,0,0,.6); }
.kh-search i { color:var(--kh-muted); align-self:center; margin-left:.8rem; } .kh-search input { flex:1; border:0; font:inherit; padding:.7rem .6rem; min-width:0; color:var(--kh-ink); background:transparent; } .kh-search input:focus { outline:none; }
.kh-stats { display:flex; gap:1.6rem; margin-top:1.8rem; flex-wrap:wrap; } .kh-stats b { display:block; font-size:1.7rem; font-weight:800; line-height:1.1; } .kh-stats span { font-size:.8rem; color:#b8c7ee; }
.kh-hero-art { position:relative; } .kh-hero-art .frame { border-radius:24px; overflow:hidden; box-shadow:0 40px 80px -30px rgba(0,0,0,.7); border:1px solid rgba(255,255,255,.2); aspect-ratio:4/3; background:#16296b; } .kh-hero-art img { width:100%; height:100%; object-fit:cover; }
.kh-float { position:absolute; background:#fff; color:var(--kh-ink); border-radius:16px; padding:.7rem 1rem; box-shadow:0 20px 40px -20px rgba(0,0,0,.5); font-size:.82rem; font-weight:700; display:flex; gap:.6rem; align-items:center; } .kh-float i { width:34px; height:34px; border-radius:10px; display:grid; place-items:center; color:#fff; background:linear-gradient(135deg,#22c55e,#16a34a); } .kh-float.a { left:-18px; bottom:28px; } .kh-float.b { right:-12px; top:22px; } .kh-float.b i { background:linear-gradient(135deg,#38bdf8,#2563eb); }
@media (max-width:900px) { .kh-hero-in { grid-template-columns:1fr; } .kh-hero-art { display:none; } .kh-hero { padding:2.4rem 0 3rem; } }
/* benefits */
.kh-benefits { margin-top:-2rem; position:relative; z-index:2; } .kh-ben-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:1rem; } @media (max-width:900px) { .kh-ben-grid { grid-template-columns:repeat(2,1fr); } }
.kh-ben { background:#fff; border:1px solid var(--kh-hair); border-radius:18px; padding:1.1rem 1.2rem; box-shadow:var(--kh-lift); display:flex; gap:.9rem; align-items:flex-start; } .kh-ben i { width:44px; height:44px; border-radius:14px; display:grid; place-items:center; color:#fff; font-size:1.1rem; flex:none; } .kh-ben b { display:block; font-size:.95rem; text-wrap:balance; } .kh-ben span { font-size:.82rem; color:var(--kh-muted); line-height:1.45; }
/* sections */
.kh-sec { padding:3.2rem 0 1rem; } .kh-sec h2 { font-size:clamp(1.4rem,3vw,1.9rem); font-weight:800; letter-spacing:-.02em; text-wrap:balance; } .kh-sec .sub { color:var(--kh-muted); margin-top:.3rem; max-width:640px; }
.kh-filters { display:flex; flex-wrap:wrap; gap:.6rem; margin:1.4rem 0 1.2rem; align-items:center; }
.kh-chip { padding:.5rem 1rem; border-radius:99px; border:1px solid var(--kh-hair); background:#fff; font-size:.86rem; font-weight:600; color:var(--kh-ink2); transition:all .2s; } .kh-chip:hover { border-color:#b6c4ee; } .kh-chip.on { background:var(--kh-night); color:#fff; border-color:var(--kh-night); }
.kh-select { padding:.5rem .9rem; border:1px solid var(--kh-hair); border-radius:12px; background:#fff; font:inherit; font-size:.86rem; font-weight:600; margin-left:auto; color:var(--kh-ink2); }
/* course card */
.kh-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(min(100%,270px),1fr)); gap:1.3rem; }
.kh-card { background:#fff; border:1px solid var(--kh-hair); border-radius:20px; overflow:hidden; box-shadow:var(--kh-lift); display:flex; flex-direction:column; transition:transform .35s var(--kh-ease),box-shadow .35s var(--kh-ease); }
.kh-card:hover { transform:translateY(-6px); box-shadow:0 30px 50px -28px rgba(12,19,48,.45); }
.kh-thumb { aspect-ratio:16/10; position:relative; background:linear-gradient(135deg,#dbeafe,#eff6ff); overflow:hidden; } .kh-thumb img { width:100%; height:100%; object-fit:cover; transition:transform .6s var(--kh-ease); } .kh-card:hover .kh-thumb img { transform:scale(1.05); }
.kh-thumb .ph { width:100%; height:100%; display:grid; place-items:center; color:#fff; font-size:2.6rem; }
.kh-badge { position:absolute; left:.8rem; top:.8rem; background:#16a34a; color:#fff; font-size:.72rem; font-weight:800; padding:.28rem .7rem; border-radius:99px; letter-spacing:.03em; box-shadow:0 8px 18px -8px rgba(22,163,74,.8); } .kh-badge.hot { left:auto; right:.8rem; background:#f59e0b; }
.kh-cbody { padding:1.1rem 1.2rem 1.2rem; display:flex; flex-direction:column; gap:.55rem; flex:1; } .kh-cat { font-size:.74rem; font-weight:700; color:var(--kh-sky); text-transform:uppercase; letter-spacing:.06em; }
.kh-cbody h3 { font-size:1.06rem; font-weight:800; line-height:1.35; text-wrap:balance; } .kh-cbody p { font-size:.86rem; color:var(--kh-muted); line-height:1.55; flex:1; } .kh-by { font-size:.8rem; color:var(--kh-ink2); display:flex; gap:.4rem; align-items:center; }
.kh-meta { display:flex; gap:.9rem; flex-wrap:wrap; font-size:.78rem; color:var(--kh-muted); font-weight:500; padding-top:.7rem; border-top:1px solid var(--kh-hair); } .kh-meta i { margin-right:.3rem; color:#94a0c4; }
.kh-cfoot { display:flex; justify-content:space-between; align-items:center; } .kh-free { font-weight:800; color:var(--kh-green); font-size:1.02rem; } .kh-go { color:var(--kh-blue); font-weight:700; font-size:.85rem; }
.kh-empty { text-align:center; padding:3rem 1rem; color:var(--kh-muted); background:#fff; border:1px dashed #cfd7ee; border-radius:18px; } .kh-empty i { font-size:2rem; color:#b6c4ee; display:block; margin-bottom:.6rem; }
.kh-skel { height:340px; border-radius:20px; background:linear-gradient(90deg,#eef2fa 25%,#f7f9fe 50%,#eef2fa 75%); background-size:200% 100%; animation:khs 1.2s infinite; } @keyframes khs { to { background-position:-200% 0; } }
/* steps & faq */
.kh-steps { display:grid; grid-template-columns:repeat(4,1fr); gap:1rem; margin-top:1.6rem; counter-reset:s; } @media (max-width:900px) { .kh-steps { grid-template-columns:repeat(2,1fr); } } @media (max-width:520px) { .kh-steps { grid-template-columns:1fr; } }
.kh-step { background:#fff; border:1px solid var(--kh-hair); border-radius:18px; padding:1.3rem 1.2rem; box-shadow:var(--kh-lift); position:relative; } .kh-step::before { counter-increment:s; content:counter(s); position:absolute; right:1rem; top:.6rem; font-size:2.6rem; font-weight:800; color:#eef2fb; line-height:1; } .kh-step i { width:46px; height:46px; border-radius:14px; background:linear-gradient(135deg,#38bdf8,#2563eb); color:#fff; display:grid; place-items:center; font-size:1.15rem; margin-bottom:.8rem; } .kh-step b { display:block; margin-bottom:.25rem; text-wrap:balance; } .kh-step span { font-size:.85rem; color:var(--kh-muted); line-height:1.5; }
.kh-faq { max-width:820px; margin-top:1.4rem; display:grid; gap:.6rem; } .kh-faq details { background:#fff; border:1px solid var(--kh-hair); border-radius:14px; padding:.2rem 1.1rem; } .kh-faq summary { cursor:pointer; padding:.9rem 0; font-weight:700; list-style:none; display:flex; justify-content:space-between; gap:1rem; } .kh-faq summary::-webkit-details-marker { display:none; } .kh-faq summary::after { content:'+'; font-size:1.3rem; color:var(--kh-sky); font-weight:700; } .kh-faq details[open] summary::after { content:'–'; } .kh-faq p { padding:0 0 1rem; color:var(--kh-ink2); font-size:.92rem; line-height:1.65; }
.kh-cta { margin:3.5rem 0 0; background:linear-gradient(135deg,#0a1230,#17307a); color:#fff; border-radius:26px; padding:2.4rem 2rem; text-align:center; } .kh-cta h2 { font-size:1.6rem; font-weight:800; text-wrap:balance; } .kh-cta p { color:#c9d6f7; margin:.5rem auto 1.4rem; max-width:560px; }
/* detail page */
.kd-hero { background:linear-gradient(155deg,#0a1230 0%,#111f52 60%,#17307a 100%); color:#fff; padding:2.2rem 0 3rem; min-height:300px; }
.kd-main-hero { max-width:calc(100% - 410px); }
.kd-grid { display:grid; grid-template-columns:1fr 370px; gap:2rem; align-items:start; } @media (max-width:980px) { .kd-grid { grid-template-columns:1fr; } }
.kd-crumb { font-size:.82rem; color:#9fb0d8; margin-bottom:1rem; } .kd-crumb a:hover { color:#fff; }
.kd-hero h1 { font-size:clamp(1.6rem,3.6vw,2.4rem); font-weight:800; line-height:1.2; letter-spacing:-.02em; text-wrap:balance; } .kd-hero .tag { color:#c9d6f7; margin-top:.7rem; font-size:1.05rem; line-height:1.6; max-width:640px; }
.kd-meta { display:flex; gap:1.1rem; flex-wrap:wrap; margin-top:1.1rem; font-size:.86rem; color:#c9d6f7; } .kd-meta i { color:#7dd3fc; margin-right:.35rem; }
.kd-side { background:#fff; color:var(--kh-ink); border-radius:22px; overflow:hidden; box-shadow:0 40px 70px -30px rgba(12,19,48,.55); border:1px solid var(--kh-hair); position:sticky; top:84px; margin-top:-250px; z-index:5; } @media (max-width:980px) { .kd-main-hero { max-width:none; } .kd-hero { min-height:0; padding-bottom:2rem; } .kd-side { position:static; margin-top:0; order:-1; } }
.kd-side .kh-thumb { aspect-ratio:16/9; } .kd-side-b { padding:1.3rem 1.4rem 1.5rem; } .kd-price { font-size:1.9rem; font-weight:800; color:var(--kh-green); line-height:1; } .kd-price small { font-size:.8rem; color:var(--kh-muted); font-weight:600; margin-left:.4rem; }
.kd-incl { list-style:none; margin:1.1rem 0 0; display:grid; gap:.55rem; font-size:.88rem; color:var(--kh-ink2); } .kd-incl i { color:var(--kh-sky); width:20px; }
.kd-prog { margin:.9rem 0 .2rem; } .kd-bar { height:8px; border-radius:99px; background:#eaeef8; overflow:hidden; } .kd-bar i { display:block; height:100%; background:linear-gradient(90deg,#38bdf8,#2563eb); border-radius:99px; transition:width .8s var(--kh-ease); } .kd-bar.g i { background:linear-gradient(90deg,#4ade80,#16a34a); }
.kd-body { padding:2rem 0 1rem; } .kd-main { min-width:0; } .kd-card { background:#fff; border:1px solid var(--kh-hair); border-radius:20px; padding:1.5rem 1.6rem; box-shadow:var(--kh-lift); margin-bottom:1.2rem; } .kd-card h2 { font-size:1.25rem; font-weight:800; margin-bottom:1rem; letter-spacing:-.01em; text-wrap:balance; }
.kd-out { list-style:none; display:grid; grid-template-columns:1fr 1fr; gap:.7rem 1.4rem; } @media (max-width:700px) { .kd-out { grid-template-columns:1fr; } } .kd-out li { display:flex; gap:.7rem; font-size:.93rem; line-height:1.5; } .kd-out i { color:var(--kh-green); margin-top:.28rem; }
.kd-less { border:1px solid var(--kh-hair); border-radius:14px; overflow:hidden; } .kd-l { display:flex; gap:.9rem; align-items:center; padding:.85rem 1rem; border-top:1px solid var(--kh-hair); font-size:.92rem; } .kd-l:first-child { border-top:0; } .kd-l .n { width:30px; height:30px; border-radius:50%; background:#eef4ff; color:var(--kh-blue); display:grid; place-items:center; font-weight:800; font-size:.8rem; flex:none; } .kd-l b { flex:1; font-weight:600; text-wrap:balance; } .kd-l small { color:var(--kh-muted); white-space:nowrap; } .kd-l i { color:#b6c4ee; }
.kd-desc p { margin-bottom:.8rem; line-height:1.75; color:var(--kh-ink2); } .kd-req { margin-left:1.2rem; color:var(--kh-ink2); line-height:1.8; }
.kd-cert { display:grid; grid-template-columns:200px 1fr; gap:1.4rem; align-items:center; } @media (max-width:600px) { .kd-cert { grid-template-columns:1fr; } } .kd-cert-mini { aspect-ratio:1.414/1; border:2px solid #0a1230; outline:1px solid #38bdf8; outline-offset:-6px; background:radial-gradient(60% 40% at 50% 0%,rgba(56,189,248,.14),transparent 70%),#fff; display:grid; place-content:center; text-align:center; padding:.6rem; border-radius:4px; } .kd-cert-mini b { font-size:.62rem; letter-spacing:.14em; color:#0a1230; } .kd-cert-mini strong { font-size:.82rem; margin:.3rem 0; } .kd-cert-mini span { font-size:.55rem; color:var(--kh-muted); }
.kd-mobile-cta { display:none; } @media (max-width:980px) { .kd-mobile-cta { display:flex; position:fixed; left:0; right:0; bottom:0; z-index:55; background:#fff; border-top:1px solid var(--kh-hair); padding:.7rem 1rem calc(.7rem + env(safe-area-inset-bottom,0)); gap:.8rem; align-items:center; box-shadow:0 -10px 30px -20px rgba(0,0,0,.4); } .kd-mobile-cta .p { font-weight:800; color:var(--kh-green); font-size:1.15rem; } .kd-mobile-cta .kh-btn { flex:1; } body.has-mcta { padding-bottom:84px; } }
/* modal & toast */
.kh-modal-bg { position:fixed; inset:0; background:rgba(10,18,48,.6); z-index:90; display:grid; place-items:center; padding:1rem; } .kh-modal { background:#fff; border-radius:22px; padding:1.7rem; width:min(480px,100%); box-shadow:0 40px 90px -30px rgba(0,0,0,.6); animation:khm .3s var(--kh-ease); } @keyframes khm { from { opacity:0; transform:translateY(16px) scale(.97); } to { opacity:1; transform:none; } }
.kh-modal h3 { font-size:1.25rem; font-weight:800; letter-spacing:-.01em; text-wrap:balance; } .kh-modal p { color:var(--kh-muted); font-size:.92rem; line-height:1.6; margin:.5rem 0 1.1rem; } .kh-modal label { display:block; font-size:.8rem; font-weight:700; margin-bottom:.35rem; color:var(--kh-ink2); } .kh-modal input[type=text] { width:100%; padding:.8rem 1rem; border:2px solid #d5def5; border-radius:12px; font:inherit; } .kh-modal input:focus { outline:none; border-color:var(--kh-blue); }
.kh-modal .acts { display:grid; gap:.6rem; margin-top:1.1rem; } .kh-modal .hint { font-size:.78rem; color:var(--kh-muted); margin-top:.4rem; } .kh-modal .err { color:var(--kh-red); font-size:.84rem; margin-top:.5rem; display:none; }
.kh-flow { display:grid; gap:.7rem; margin:1rem 0 .4rem; } .kh-flow div { display:flex; gap:.8rem; align-items:flex-start; font-size:.9rem; } .kh-flow b { width:26px; height:26px; border-radius:50%; background:#eef4ff; color:var(--kh-blue); display:grid; place-items:center; font-size:.78rem; flex:none; }
.kh-toast { position:fixed; left:50%; bottom:calc(24px + env(safe-area-inset-bottom,0)); transform:translate(-50%,30px); background:#0a1230; color:#fff; padding:.8rem 1.2rem; border-radius:14px; font-size:.92rem; font-weight:600; opacity:0; pointer-events:none; transition:all .35s var(--kh-ease); z-index:100; max-width:92vw; } .kh-toast.show { opacity:1; transform:translate(-50%,0); } .kh-toast.err { background:#991b1b; }
.kh-fade { animation:khf .55s var(--kh-ease) both; } @keyframes khf { from { opacity:0; transform:translateY(14px); } to { opacity:1; transform:none; } }
@media (prefers-reduced-motion:reduce) { * { animation-duration:.01ms !important; transition-duration:.01ms !important; } }

/* ===== CHÂN TRANG — đồng bộ nguyên bản với website chính (index.html, lien-he.html…) ===== */
:root { --blue-grad-primary: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #0284c7 100%); --white: #ffffff; }
    footer { background: var(--blue-grad-primary); color: #cbd5e1; padding: 4rem 1.5rem 2rem; font-size: 0.92rem; line-height: 1.6; margin-top: 4rem; }
    .footer-grid { max-width: 1240px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr)); gap: 2.5rem; text-align: left; }
    .footer-grid h4 { color: var(--white); margin-bottom: 1rem; font-size: 1.05rem; }

    .gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.5rem; max-width: 220px; }
    @media (max-width: 960px) {
      .gallery-grid { max-width: 100%; gap: 0.7rem; }
    }
    .gallery-thumb {
      position: relative; aspect-ratio: 1 / 1; border-radius: 8px; overflow: hidden; cursor: pointer;
      border: 1px solid rgba(255,255,255,0.18); background: rgba(255,255,255,0.08);
    }
    .gallery-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.3s; }
    .gallery-thumb:hover img { transform: scale(1.12); }
    .gallery-thumb::after {
      content: '\f00e'; font-family: "Font Awesome 6 Free"; font-weight: 900; color: #fff;
      position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
      font-size: 0.85rem; background: rgba(15, 23, 42, 0); opacity: 0; transition: all 0.2s;
    }
    .gallery-thumb:hover::after { background: rgba(15, 23, 42, 0.4); opacity: 1; }

    .gallery-modal {
      display: none; position: fixed; inset: 0; background: rgba(15, 23, 42, 0.9);
      z-index: 10001; align-items: center; justify-content: center; padding: 1.5rem;
    }
    .gallery-modal.active { display: flex; }
    .gallery-modal-inner { position: relative; max-width: 900px; width: 100%; text-align: center; }
    .gallery-modal-img {
      max-width: 100%; max-height: 78vh; border-radius: 12px; box-shadow: 0 20px 50px rgba(0,0,0,0.4);
      cursor: zoom-in; transition: transform 0.25s; background: #0f172a;
    }
    .gallery-modal-img.zoomed { cursor: zoom-out; transform: scale(1.35); }
    .gallery-modal-close {
      position: absolute; top: -46px; right: 0; width: 38px; height: 38px; border-radius: 50%;
      background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.3); color: #fff;
      font-size: 1.1rem; cursor: pointer; display: flex; align-items: center; justify-content: center;
      transition: background 0.2s;
    }
    .gallery-modal-close:hover { background: rgba(255,255,255,0.28); }
    .gallery-modal-nav {
      position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; border-radius: 50%;
      background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.3); color: #fff;
      font-size: 1.05rem; cursor: pointer; display: flex; align-items: center; justify-content: center;
      transition: background 0.2s;
    }
    .gallery-modal-nav:hover { background: rgba(255,255,255,0.25); }
    .gallery-modal-prev { left: -18px; }
    .gallery-modal-next { right: -18px; }
    @media (max-width: 700px) {
      .gallery-modal-prev { left: 4px; }
      .gallery-modal-next { right: 4px; }
    }
    .gallery-modal-caption { color: #e2e8f0; font-size: 0.88rem; margin-top: 1rem; }

    .footer-transparency-strip { max-width: 1240px; margin: 1.3rem auto 0; padding: 0.8rem 0 0; border-top: 1px solid rgba(255,255,255,.1); text-align: center; }
    .footer-transparency-strip p { font-size: 0.88rem; color: #94a3b8; margin-bottom: 0.6rem; }
    .footer-transparency-strip .transparency-claim { font-weight: 500; color: #7dd3fc; text-decoration: none; }
    .footer-transparency-strip .transparency-sep { color: #475569; margin: 0 0.6rem; }

    .footer-bottom {
      max-width: 1240px; margin: 1.3rem auto 0; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,0.1);
      font-size: 0.85rem; color: #94a3b8;
      display: flex; flex-direction: column; align-items: center; gap: 0.9rem; text-align: center;
    }
    .footer-bottom a { color: #94a3b8; text-decoration: none; }
    .footer-bottom a:hover { color: #e0f2fe; text-decoration: underline; }
    .footer-bottom-socials { display: flex; align-items: center; justify-content: center; gap: 0.6rem; order: 2; }
    .footer-bottom-socials .footer-bottom-social { width: 30px; height: 30px; font-size: 0.85rem; }
    .footer-bottom-text { text-align: center; order: 1; }
    .social-link {
      width: 30px; height: 30px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;
      color: #cbd5e1; border: 1px solid rgba(255,255,255,.18); text-decoration: none; transition: all .2s;
    }
    .social-link:hover { color: #fff; background: rgba(255,255,255,.1); transform: translateY(-2px); }
    @media (max-width: 640px) {
      .footer-bottom { display: flex; flex-direction: column; align-items: center; gap: 0.8rem; }
      .footer-bottom-text { text-align: center; order: 1; }
      .footer-bottom-socials { order: 2; }
    }