:root{--blue:#1B9CD8;--blue-dark:#1583b6;--navy:#0a1929;--navy-2:#0f2238;--ink:#0b1622;--muted:#5a6b7a;--line:#e6ecf2;--bg:#ffffff;--bg-soft:#f5f8fb;--radius:14px;--maxw:1180px;--shadow:0 10px 40px -12px rgba(10,25,41,.18)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--blue-dark)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
h1,h2,h3,h4{font-weight:800;line-height:1.15;letter-spacing:-.02em;color:var(--ink)}
h1{font-size:clamp(2.2rem,5vw,3.8rem)}
h2{font-size:clamp(1.7rem,3.4vw,2.6rem);margin-bottom:.8rem}
h3{font-size:1.25rem;margin-bottom:.5rem}
p{color:var(--muted)}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);background:rgba(27,156,216,.12);padding:6px 12px;border-radius:99px;margin-bottom:18px}

/* NAV */
.nav{position:sticky;top:0;background:rgba(10,25,41,.92);backdrop-filter:blur(10px);z-index:50;border-bottom:1px solid rgba(255,255,255,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;max-width:var(--maxw);margin:0 auto}
.nav img{height:42px;width:auto}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{color:#cdd9e4;font-weight:500;font-size:.95rem}
.nav-links a:hover{color:#fff}
.nav-links .btn{color:#fff}
@media(max-width:720px){.nav-links a:not(.btn){display:none}}

/* BUTTONS */
.btn{display:inline-block;background:var(--blue);color:#fff!important;padding:14px 26px;border-radius:10px;font-weight:700;font-size:.95rem;border:none;cursor:pointer;transition:transform .15s ease,background .15s ease;box-shadow:0 6px 20px -6px rgba(27,156,216,.55)}
.btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.btn-lg{padding:18px 36px;font-size:1.05rem}
.btn-ghost{background:transparent;border:2px solid rgba(255,255,255,.25);box-shadow:none}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:#fff}

/* HERO */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 60%,#0a2540 100%);color:#fff;padding:90px 0 110px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-200px;right:-200px;width:600px;height:600px;background:radial-gradient(circle,rgba(27,156,216,.18) 0%,transparent 70%);border-radius:50%}
.hero::after{content:"";position:absolute;bottom:-300px;left:-150px;width:500px;height:500px;background:radial-gradient(circle,rgba(27,156,216,.1) 0%,transparent 70%);border-radius:50%}
.hero .container{position:relative;z-index:1}
.hero h1{color:#fff;max-width:900px;margin-bottom:24px}
.hero .lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:#b8c7d6;max-width:720px;margin-bottom:36px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero .eyebrow{background:rgba(27,156,216,.18);color:#7ec9ec}

/* SECTIONS */
section{padding:80px 0}
.section-soft{background:var(--bg-soft)}
.section-dark{background:var(--navy);color:#fff}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark p{color:#a9b8c7}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}

/* CARDS */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(360px,1fr))}
.card{background:#fff;padding:32px 28px;border-radius:var(--radius);border:1px solid var(--line);transition:transform .2s ease,box-shadow .2s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card-icon{width:48px;height:48px;border-radius:12px;background:rgba(27,156,216,.12);display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin-bottom:18px;color:var(--blue);font-weight:800}
.section-dark .card{background:var(--navy-2);border-color:rgba(255,255,255,.08)}

/* COURSE-SPECIFIC */
.bullets{list-style:none;padding:0}
.bullets li{padding:10px 0 10px 32px;position:relative;color:var(--ink)}
.bullets li::before{content:"";position:absolute;left:0;top:18px;width:18px;height:18px;border-radius:50%;background:var(--blue);background-image:linear-gradient(135deg,var(--blue),var(--blue-dark))}
.bullets li::after{content:"✓";position:absolute;left:4px;top:11px;color:#fff;font-size:.75rem;font-weight:900}
.session{background:#fff;border-left:4px solid var(--blue);padding:24px 28px;border-radius:8px;margin-bottom:16px;box-shadow:0 2px 8px rgba(10,25,41,.04)}
.session-num{font-size:.78rem;font-weight:800;color:var(--blue);letter-spacing:.12em;text-transform:uppercase}
.cohort{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px;margin-bottom:14px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.cohort-date{font-weight:800;color:var(--ink);font-size:1.1rem}
.cohort-meta{color:var(--muted);font-size:.92rem;margin-top:4px}
.tag{display:inline-block;background:rgba(27,156,216,.12);color:var(--blue);padding:4px 10px;border-radius:6px;font-size:.78rem;font-weight:700;margin-right:6px}
.price-box{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:48px;border-radius:16px;text-align:center}
.price-box .price{font-size:3.5rem;font-weight:900;color:#fff;margin:8px 0}
.price-box p{color:#a9b8c7}

/* FOOTER */
footer{background:var(--navy);color:#a9b8c7;padding:56px 0 32px;text-align:center}
footer img{height:56px;margin:0 auto 20px}
footer .footer-links{margin:20px 0}
footer .footer-links a{color:#cdd9e4;margin:0 14px;font-size:.92rem}
footer .copyright{font-size:.85rem;color:#6b7d8e;margin-top:24px}

/* STICKY CTA on course page */
.sticky-cta{position:fixed;bottom:20px;right:20px;z-index:40;box-shadow:0 12px 40px -10px rgba(27,156,216,.6)}
@media(max-width:600px){.sticky-cta{bottom:14px;right:14px;left:14px;text-align:center}.cohort{flex-direction:column;align-items:flex-start}}