:root{--navy:#03182d;--dark:#010a13;--navy2:#082c4b;--silver:#cbd5e1;--white:#f8fbff;--muted:#9fb0c0;--line:#d9e2ea;--green:#17824b}*{box-sizing:border-box}body{margin:0;min-width:320px;color:#182536;background:linear-gradient(145deg,#e9f1f6,#cbdbe6);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{text-decoration:none;color:inherit}.portal-nav{height:110px;padding:0 clamp(1rem,4vw,4rem);display:flex;align-items:center;gap:clamp(1rem,4vw,4rem);color:#fff;background:rgba(1,10,19,.98);border-bottom:1px solid rgba(255,255,255,.15)}.portal-logo{position:relative;z-index:50;width:225px;flex:0 0 225px;transform:translateY(8px)}.portal-logo img{display:block;width:100%;filter:drop-shadow(0 4px 10px #000)}.portal-nav nav{align-self:stretch;display:flex}.portal-nav nav a{min-width:120px;padding:0 1rem;display:grid;place-items:center;font-weight:800}.portal-nav nav a.active{color:#0b1118;background:linear-gradient(135deg,#fff,#aeb7c4)}.aviator-chip{margin-left:auto;display:flex;align-items:center;gap:1rem;font-weight:800}.aviator-chip a{padding:.55rem .8rem;border:1px solid rgba(255,255,255,.35);font-size:.75rem}.portal-main,.course-main{width:min(1180px,calc(100% - 2rem));margin:0 auto;padding:clamp(2rem,6vw,5rem) 0}.welcome p,.course-card p{margin:0;color:#5c6d7c;font-size:.75rem;font-weight:900;letter-spacing:.18em}.welcome h1{margin:.35rem 0;font-family:Georgia,serif;font-size:clamp(2.6rem,6vw,5rem);font-weight:400;color:var(--navy)}.welcome span{color:#5c6d7c}.course-grid{margin-top:2rem}.course-card{display:grid;grid-template-columns:auto 1fr auto;gap:1.5rem;align-items:center;padding:clamp(1.25rem,3vw,2.2rem);background:#fff;border:1px solid #c4d1dc;box-shadow:0 20px 55px rgba(3,24,45,.12)}.course-number{width:78px;height:78px;display:grid;place-items:center;color:#fff;background:var(--navy);font-size:1.8rem;font-weight:900}.course-card h2{margin:.25rem 0;font-size:2rem;color:var(--navy)}.course-card span{color:#5c6d7c}.course-button,.primary-action{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:.8rem 1.3rem;color:#07101a;background:linear-gradient(135deg,#fff,#aeb7c4);border:1px solid #8796a4;font-weight:900}.course-card.locked{opacity:.6}.course-lock{font-weight:900}.study-tabs{display:flex;justify-content:center;gap:.75rem;padding:1rem;background:#29333e}.study-tabs a,.study-tabs span{min-width:170px;padding:.85rem 1rem;text-align:center;color:#fff;background:#58636e;font-weight:850}.study-tabs .active{color:#07101a;background:linear-gradient(135deg,#fff,#aeb7c4)}.unit-card{background:#fff;border:1px solid #c5d2dd;box-shadow:0 24px 60px rgba(3,24,45,.13)}.unit-card>header{padding:1.35rem 1.6rem;display:flex;align-items:center;justify-content:space-between;color:#fff;background:linear-gradient(110deg,var(--navy),var(--navy2))}.unit-card header small{color:var(--silver);font-weight:900;letter-spacing:.14em}.unit-card header h1{margin:.3rem 0 0;font-size:clamp(1.6rem,4vw,2.5rem)}.unit-card header>span{font-weight:900;font-style:italic}.unit-copy{position:relative;padding:1.7rem}.unit-copy h2{font-size:1.8rem}.unit-copy h3{margin:1rem 0 .25rem}.unit-copy p{max-width:850px;line-height:1.65}.primary-action{margin-top:.6rem;background:var(--green);border-color:var(--green);color:#fff}.unit-list{margin:0 1.7rem 1.7rem;border:1px solid var(--line)}.unit-list>div{display:grid;grid-template-columns:1fr 150px 150px;gap:1rem;padding:1rem;border-bottom:1px solid var(--line)}.unit-list>div:last-child{border:0}.unit-list span,.unit-list em{color:#607181}.login-page{min-height:100svh;color:#fff;background:radial-gradient(circle at 50% 15%,#0d436e,var(--dark) 68%)}.login-shell{min-height:100svh;width:min(1040px,100%);margin:auto;padding:2rem;display:grid;grid-template-columns:1fr minmax(360px,480px);align-items:center;gap:4rem}.login-brand{text-align:center}.login-brand img{width:min(100%,500px);filter:drop-shadow(0 18px 35px #000)}.login-brand p{font-weight:900;letter-spacing:.22em}.login-card{display:grid;gap:1rem;padding:2rem;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:14px;box-shadow:0 28px 80px rgba(0,0,0,.35)}.login-card h1{margin:0;font-family:Georgia,serif;font-size:2.4rem;font-weight:400}.login-card p{margin:0;color:#c5d0da}.login-card label{display:grid;gap:.4rem;color:#d7e1e9;font-size:.78rem;font-weight:850}.login-card input{min-height:52px;padding:.75rem .9rem;color:#fff;background:rgba(1,10,19,.7);border:1px solid rgba(255,255,255,.25);border-radius:4px}.login-card button{min-height:52px;border:0;background:linear-gradient(135deg,#fff,#aeb7c4);font-weight:900}.login-card>a{text-align:center;color:var(--silver);font-size:.82rem}.alert{padding:.8rem 1rem;color:#fff;background:#8c2929;border-left:4px solid #ff8c86}.alert.success{background:#12633c;border-color:#66d99d}@media(max-width:760px){.portal-nav{height:auto;min-height:70px;flex-wrap:wrap;padding-block:.75rem}.portal-logo{width:181px;flex-basis:181px;transform:translateY(4px)}.portal-nav nav{order:3;width:100%;overflow:auto}.portal-nav nav a{min-width:110px;padding:.75rem}.aviator-chip{font-size:.75rem}.course-card{grid-template-columns:auto 1fr}.course-button,.course-lock{grid-column:1/-1}.study-tabs{justify-content:flex-start;overflow:auto}.study-tabs a,.study-tabs span{min-width:145px}.unit-card>header{align-items:flex-start}.unit-card header>span{font-size:.72rem}.unit-list>div{grid-template-columns:1fr auto}.unit-list em{grid-column:1/-1}.login-shell{grid-template-columns:1fr;gap:1rem}.login-brand img{width:min(78vw,380px)}}